Patent US1809769A successfully refreshed from Google Patents.
Patent EP0254491A1 successfully refreshed from Google Patents.
EP0254491A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A guard bar for a razor head and razor system
Assignee: Warner Lambert Co LLC
•
Filing: 1987-07-17
•
Granted: —
•
Expires: 2007-07-17
Abstract
Abstract This invention provides a razor having a guard bar (11) with knurls (13) and a single sharp blade (14) particularly adapted for shaving one suffering from pseudofolliculitis barbae.
Inventors
- 👤 Carl A. Hultman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 23:09
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/02; B26B21/40; B26B21/4012; B26B21/4018; B26B19/00; B26B19/38; B26B19/42; B26B21/08; B26B21/14; B26B21/16; B26B21/4025
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
39 words
A guard bar for a razor head characterised by at least ten closely spaced knurls per lineal guard bar inch as measured across the guard bar length, wherein said knurls define a discontinuous upper surface at the apices thereof.
Claim 2
Dependent Claim
39 words
A guard bar for a razor head characterised by at least ten closely spaced knurls per lineal guard bar inch as measured across the guard bar length, wherein said knurls define a discontinuous upper surface at the apices thereof.
Claim 3
Dependent Claim
33 words
A guard bar according to Claim 1, characterised in that each knurl has an upper surface defined by sides between substantially 0.004 in. (0.01 cm) and substantially 0.0005 in. (0.0013 cm) in length.
Claim 4
Dependent Claim
39 words
A guard bar according to Claim 1 or 2, characterised in that the height of the upper surface is at least substantially 0.002 in. (0.0051 cm) as measured from the space between knurls to the top of the knurl.
Claim 5
Dependent Claim
32 words
A guard bar according to Claim 1, 2 or 3, characterised in that the angle formed by the side and the top of the knurl is between substantially 30° and substantially 90°.
Claim 6
Dependent Claim
73 words
A razor system characterised by a blade assembly with a single blade having a shaving edge, a blade seat for supporting said blade assembly and maintaining said blade at a predetermined shaving angle, and extending beyond the blade edge to form a guard bar, and a cap positioned above said blade, wherein said guard bar has at least ten closely spaced knurls per lineal transverse inch as measured along the guard bar length.
Claim 7
Dependent Claim
73 words
A razor system characterised by a blade assembly with a single blade having a shaving edge, a blade seat for supporting said blade assembly and maintaining said blade at a predetermined shaving angle, and extending beyond the blade edge to form a guard bar, and a cap positioned above said blade, wherein said guard bar has at least ten closely spaced knurls per lineal transverse inch as measured along the guard bar length.
Claim 8
Dependent Claim
26 words
A razor system according to Claim 5, characterised in that the guard bar has at least twenty closely spaced knurls to the lineal guard bar inch.
Claim 9
Dependent Claim
30 words
A razor system according to Claim 5 or 6, characterised in that the guard bar has a plurality of transversely extending rows of knurls parallel to said blade shaving edge.
Claim 10
Dependent Claim
25 words
A razor system according to Claim 5, 6 or 7, characterised in that said cap has fingers extending substantially to the edge of said blade.
Claim 11
Dependent Claim
28 words
A razor system according to Claim 5, 6, 7 or 8, characterised in that the blade has a radius of curvature between substantially 400 and substantially 800 Angstroms.
Claim 12
Dependent Claim
29 words
A razor system according to any of Claims 5 to 9, characterised in that the blade has a gothic arch angle between substantially 35° and substantially 80 ° .
Claim 13
Dependent Claim
47 words
A razor system according to any of Claims 5 to 10, characterised by further comprising a handle, wherein said blade seat extends at an angle from an end of said handle, and said cap is connected with at least one of the handle and said blade seat.
Claim 14
Dependent Claim
17 words
A razor system according Claims 11, characterised in that a Velcro patch is provided on said handle.
Claim 15
Dependent Claim
30 words
A razor system according to any of Claims 5 to 12, characterised in that the blade exposure is between substantially 0.001 inches (0.0025 cm) and substantially 0.004 inches (0.01 cm).
Claim 16
Dependent Claim
29 words
A razor system according to any of Claims 5 to 13, characterised in that the span is between substantially 0.005 inches (0.013 cm) and substantially 0.0066 inches (0.0168 cm).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.