US3643331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal plate having stabilized friction properties
Assignee: Individual
•
Filing: 1970-06-24
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Granted: 1972-02-22
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Expires: 1990-06-24
Abstract
Abstract A shearing foil for a razor constituted by a metal plate having a surface which is in slidable contact with the surface of another foil, and microscopically small solid particles embedded in the plate at least at the contact surface.
Inventors
- 👤 Bodo Futterer
- 👤 Hugo Fritschy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:37
CPC Classifications
B; B26; B26B; B26B19/00; B26B19/38; B26B19/384; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A shearing foil for electric shavers which have a moving cutting member, said foil comprising a substrate body having perforations, said body having microscopically small particles of a solid having a maximum grain size of 1/100 mm. embedded in at least the surface of the shearing foil which is in frictional contact with the moving cutting member.
Claim 2
Dependent Claim
57 words
A shearing foil for electric shavers which have a moving cutting member, said foil comprising a substrate body having perforations, said body having microscopically small particles of a solid having a maximum grain size of 1/100 mm. embedded in at least the surface of the shearing foil which is in frictional contact with the moving cutting member.
Claim 3
Dependent Claim
13 words
The shearing foil of claim 1, wherein the microscopic particles are abrasive particles.
Claim 4
Dependent Claim
14 words
The shearing foil of claim 1, wherein the microscopic particles are polishing material partIcles.
Claim 5
Dependent Claim
15 words
The shearing foil of claim 1, wherein the microscopic particles are constituted of different substances.
Claim 6
Dependent Claim
14 words
The shearing foil of claim 1, wherein the microscopic particles are solid lubricant particles.
Claim 7
Dependent Claim
20 words
The shearing foil of claim 1, wherein the microscopic particles are embedded uniformly in the body of the shearing foil.
Claim 8
Dependent Claim
75 words
In a pair of shearing foils for electric shavers having a stationary external shearing foil and a moving internal shearing foil, at least one of said shearing foils comprising a substrate body having perforations, said body having microscopically small particles of a solid having a maximum grain size of 1/100 mm. embedded in at least the surface of the said one shearing foil which is in frictional contact with the other of said shearing foils.
Claim 9
Dependent Claim
75 words
In a pair of shearing foils for electric shavers having a stationary external shearing foil and a moving internal shearing foil, at least one of said shearing foils comprising a substrate body having perforations, said body having microscopically small particles of a solid having a maximum grain size of 1/100 mm. embedded in at least the surface of the said one shearing foil which is in frictional contact with the other of said shearing foils.
Claim 10
Dependent Claim
15 words
The pair of shearing foils of claim 7, wherein the microscopic particles are abrasive particles.
Claim 11
Dependent Claim
16 words
The pair of shearing foils of claim 7, wherein the microscopic particles are polishing material particles.
Claim 12
Dependent Claim
17 words
The pair of shearing foils of claim 7, wherein the microscopic particles are constituted of different substances.
Claim 13
Dependent Claim
16 words
The pair of shearing foils of claim 7, wherein the microscopic particles are solid lubricant particles.
Claim 14
Dependent Claim
22 words
The pair of shearing foils of claim 7, wherein the microscopic particles are embedded uniformly in the body of the shearing foil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |