US5903979A — Safety razors

Claim 1

Independent Claim 114 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s) and having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a non-rigid shaving enhancement product, each of said pockets opening at the skin contacting surface and being defined by side wall portions depending inward from the skin contacting surface, said pockets being distributed along the surface and across the width thereof in a plurality of generally longitudinally extending rows forming an array spanning substantially the whole of the area of the skin contacting surface.

Claim 2

Dependent Claim 114 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s) and having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a non-rigid shaving enhancement product, each of said pockets opening at the skin contacting surface and being defined by side wall portions depending inward from the skin contacting surface, said pockets being distributed along the surface and across the width thereof in a plurality of generally longitudinally extending rows forming an array spanning substantially the whole of the area of the skin contacting surface.

Claim 3

Dependent Claim 17 words

A safety razor blade unit according to claim 1, wherein the pockets have smoothly curved side walls.

Claim 4

Dependent Claim 25 words

A safety razor blade unit according to claim 2, wherein the pockets are cylindrical with the axes thereof substantially perpendicular to the skin contacting surface.

Claim 5

Dependent Claim 16 words

A safety razor blade unit according to claim 3, wherein the pockets are right circular cylindrical.

Claim 6

Dependent Claim 21 words

A safety razor blade unit according to claim 4, wherein the pockets have a depth not greater than the pocket diameter.

Claim 7

Dependent Claim 26 words

A safety razor blade unit according to claim 1, wherein the pockets have depth at least about 50% of the maximum transverse dimension of the pockets.

Claim 8

Dependent Claim 24 words

A safety razor blade unit according to claim 6, wherein the pockets have depth not greater than the maximum transverse dimension of the pockets.

Claim 9

Dependent Claim 32 words

A safety razor blade unit according to claim 1, wherein the skin engaging member comprises a resilient material to flex during shaving and exert traction force on the skin surface being shaved.

Claim 10

Dependent Claim 27 words

A safety razor blade unit according to claim 1, wherein the distance between adjacent pockets is less than 50% of the maximum transverse dimension of the pockets.

Claim 11

Dependent Claim 20 words

A safety razor blade unit according to claim 1, wherein there are at least three longitudinally extending rows of pockets.

Claim 12

Dependent Claim 29 words

A safety razor blade unit according to claim 1, wherein the skin engaging member occupies a position of a guard surface in advance of the at least one blade.

Claim 13

Dependent Claim 27 words

A safety razor blade unit according to claim 1, wherein the skin engaging member occupies a position of a cap surface behind the at least one blade.

Claim 14

Dependent Claim 26 words

A safety razor blade unit according to claim 1, wherein the pockets are further defined by floor portions formed transverse to the depending side wall portions.

Claim 15

Dependent Claim 141 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s) and having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a non-rigid shaving enhancement product, each of said pockets opening at the skin contacting surface and being defined by side wall portions depending inward from the skin contacting surface, said pockets being distributed along the surface and across the width thereof in a plurality of generally longitudinally extending rows forming an array spanning substantially the whole area of the skin contacting surface, each pocket containing the non-rigid shaving enhancement product which is retained in the pocket due to the properties of the product and which is discharged gradually therefrom during shaving.

Claim 16

Dependent Claim 141 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s) and having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a non-rigid shaving enhancement product, each of said pockets opening at the skin contacting surface and being defined by side wall portions depending inward from the skin contacting surface, said pockets being distributed along the surface and across the width thereof in a plurality of generally longitudinally extending rows forming an array spanning substantially the whole area of the skin contacting surface, each pocket containing the non-rigid shaving enhancement product which is retained in the pocket due to the properties of the product and which is discharged gradually therefrom during shaving.

Claim 17

Dependent Claim 26 words

A safety razor blade unit according to claim 14, wherein the pockets have depth at least about 50% of the maximum transverse dimension of the pockets.

Claim 18

Dependent Claim 24 words

A safety razor blade unit according to claim 15, wherein the pockets have depth not greater than the maximum transverse dimension of the pockets.

Claim 19

Dependent Claim 32 words

A safety razor blade unit according to claim 14, wherein the skin engaging member comprises a resilient material to flex during shaving and exert traction force on the skin surface being shaved.

Claim 20

Dependent Claim 27 words

A safety razor blade unit according to claim 14, wherein the distance between adjacent pockets is less than 50% of the maximum transverse dimension of the pockets.

Claim 21

Dependent Claim 20 words

A safety razor blade unit according to claim 14, wherein there are at least three longitudinally extending rows of pockets.

Claim 22

Dependent Claim 29 words

A safety razor blade unit according to claim 14, wherein the skin engaging member occupies a position of a guard surface in advance of the at least one blade.

Claim 23

Dependent Claim 27 words

A safety razor blade unit according to claim 14, wherein the skin engaging member occupies a position of a cap surface behind the at least one blade.

Claim 24

Dependent Claim 26 words

A safety razor blade unit according to claim 14, wherein the pockets are further defined by floor portions formed transverse to the depending side wall portions.

Claim 25

Dependent Claim 72 words

A safety razor blade unit according to claim 13 or 22, further comprising a reservoir chamber containing the non-rigid shaving enhancement product, and wherein the pocket floor portions define flow restricting apertures in communication with the reservoir chamber, said flow restricting apertures metering a flow of the product from the reservoir chamber to the skin contacting surface and constricting a backflow into the reservoir chamber so the pockets remain charged with product.

Claim 26

Dependent Claim 135 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s) and having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a non-rigid shaving enhancement product, each of said pockets opening at the skin contacting surface and being defined by side wall portions depending inward from the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole area of the skin contacting surface, and inner end portions of at least some of the pockets defining flow metering apertures communicating with a reservoir chamber containing the shaving enhancement product to be dispersed via the pockets.

Claim 27

Dependent Claim 135 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s) and having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a non-rigid shaving enhancement product, each of said pockets opening at the skin contacting surface and being defined by side wall portions depending inward from the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole area of the skin contacting surface, and inner end portions of at least some of the pockets defining flow metering apertures communicating with a reservoir chamber containing the shaving enhancement product to be dispersed via the pockets.

Claim 28

Dependent Claim 17 words

A safety razor blade unit according to claim 24, wherein each pocket communicates with the reservoir chamber.

Claim 29

Dependent Claim 23 words

A safety razor blade unit according to claim 24, wherein the pockets are formed in a wall member partially confining the reservoir chamber.

Claim 30

Dependent Claim 20 words

A safety razor blade unit according to claim 24, wherein the pockets are positioned in a plurality of longitudinal rows.

Claim 31

Dependent Claim 20 words

A safety razor blade unit according to claim 27, wherein there are at least three longitudinally extending rows of pockets.

Claim 32

Dependent Claim 26 words

A safety razor blade unit according to claim 24, wherein the pockets have depth at least about 50% of the maximum transverse dimension of the pockets.

Claim 33

Dependent Claim 24 words

A safety razor blade unit according to claim 29, wherein the pockets have depth not greater than the maximum transverse dimension of the pockets.

Claim 34

Dependent Claim 32 words

A safety razor blade unit according to claim 24, wherein the skin engaging member comprises a resilient material to flex during shaving and exert traction force on the skin surface being shaved.

Claim 35

Dependent Claim 27 words

A safety razor blade unit according to claim 24, wherein the distance between adjacent pockets is less than 50% of the maximum transverse dimension of the pockets.

Claim 36

Dependent Claim 29 words

A safety razor blade unit according to claim 24, wherein the skin engaging member occupies a position of a guard surface in advance of the at least one blade.

Claim 37

Dependent Claim 27 words

A safety razor blade unit according to claim 24, wherein the skin engaging member occupies a position of a cap surface behind the at least one blade.

Claim 38

Dependent Claim 25 words

A safety razor blade unit according to claim 1, 14 or 24, wherein the at least one elongate blade comprises a linear edged blade member.

Claim 39

Dependent Claim 112 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s), said member having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a shaving enhancement product, each of said pockets opening at the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole of the area of the skin contacting surface, wherein the pockets are positioned in a plurality of longitudinal rows, and the pockets of adjacent rows are longitudinally offset.

Claim 40

Dependent Claim 112 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s), said member having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a shaving enhancement product, each of said pockets opening at the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole of the area of the skin contacting surface, wherein the pockets are positioned in a plurality of longitudinal rows, and the pockets of adjacent rows are longitudinally offset.

Claim 41

Dependent Claim 36 words

A safety razor blade unit according to claim 1 or 36, wherein adjacent pockets of the array of pockets are spaced at a distance of 5% to 100% of the maximum transverse dimension of the pockets.

Claim 42

Dependent Claim 139 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s), said member having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a shaving enhancement product, each of said pockets opening at the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole area of the skin contacting surface, each pocket containing a shaving enhancement product which is retained in the pocket due to the properties of the product and which is discharged gradually therefrom during shaving, and wherein the pockets are positioned in a plurality of longitudinal rows, wherein the pockets of adjacent rows are longitudinally offset.

Claim 43

Dependent Claim 139 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s), said member having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a shaving enhancement product, each of said pockets opening at the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole area of the skin contacting surface, each pocket containing a shaving enhancement product which is retained in the pocket due to the properties of the product and which is discharged gradually therefrom during shaving, and wherein the pockets are positioned in a plurality of longitudinal rows, wherein the pockets of adjacent rows are longitudinally offset.

Claim 44

Dependent Claim 137 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s), said member having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a shaving enhancement product, each of said pockets opening at the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole area of the skin contacting surface, and inner end portions of at least some of the pockets communicating with a reservoir chamber containing shaving enhancement product to be dispersed via the pockets, and wherein the pockets are positioned in a plurality of longitudinal rows, wherein the pockets of adjacent rows are longitudinally offset.

Claim 45

Dependent Claim 137 words

A safety razor blade unit comprising at least one elongate blade, and a skin engaging member extending longitudinally of the blade(s), said member having a skin contacting surface exposed for contact with a skin of a user during shaving, said member including a multiplicity of pockets for holding respective portions of a shaving enhancement product, each of said pockets opening at the skin contacting surface, said pockets being distributed along the surface and across the width thereof in an array spanning substantially the whole area of the skin contacting surface, and inner end portions of at least some of the pockets communicating with a reservoir chamber containing shaving enhancement product to be dispersed via the pockets, and wherein the pockets are positioned in a plurality of longitudinal rows, wherein the pockets of adjacent rows are longitudinally offset.

Claim 46

Dependent Claim 60 words

A safety razor blade unit according to claim 36, 38 or 39, wherein neighboring rows are offset relative one another in the longitudinal direction by an amount less than a maximum transverse dimension of the pockets, whereby an overlap, as viewed projected in a direction transverse to the longitudinal extent of the rows, results between neighboring pockets of adjacent rows.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-05-17	2002-11-16	2003-05-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-05-17	2006-11-16	2007-05-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-05-17	2010-11-16	2011-05-18	$7700.00	Window Closed / Lapsed

Safety razors

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