US4603477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety razors
Assignee: Gillette Co LLC
•
Filing: 1985-02-06
•
Granted: 1986-08-05
•
Expires: 2005-02-06
Abstract
Abstract In a safety razor having cutting edges directed towards each other across a gap, i.e. an opposed blade razor, the blade edges are each formed with undulating edges. The blade margins are preferably corrugated and the corrugations intersected by planar facets (12), the facets of the two blades being substantially in the same plane (T).
Inventors
- 👤 John F. Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:49
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; B26B21/56; B26B21/08; B26B21/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
A safety razor comprising a pair of opposed blade means having respective sharpened cutting edges directed toward each other with a gap therebetween, each of said sharpened cutting edges being of undulating form so as to have alternating peaks and troughs, wherein each said blade means has a marginal edge portion formed with corrugations extending transversely to the length of the edge and a substantially planar facet intersecting said corrugations over the full depth thereof to define a continuous undulating sharpened cutting edge.
Claim 2
Dependent Claim
83 words
A safety razor comprising a pair of opposed blade means having respective sharpened cutting edges directed toward each other with a gap therebetween, each of said sharpened cutting edges being of undulating form so as to have alternating peaks and troughs, wherein each said blade means has a marginal edge portion formed with corrugations extending transversely to the length of the edge and a substantially planar facet intersecting said corrugations over the full depth thereof to define a continuous undulating sharpened cutting edge.
Claim 3
Dependent Claim
31 words
The safety razor of claim 1, wherein the said edges are of substantially identical form, and the peaks of one said edge are in registry with the troughs of the other.
Claim 4
Dependent Claim
28 words
The safety razor of claim 1, wherein the said edges are of substantially identical form, and the peaks of the respective edges are in registry with each other.
Claim 5
Dependent Claim
98 words
A safety razor comprising blade support means and a pair of opposed blade means having respective sharpened cutting edges directed toward each other across a gap defined by said edges, wherein each said blade means has a longitudinally extending marginal edge portion formed with a series of corrugations each extending traversely to the length of said edge portion and said blade means further comprises a substantially planar facet intersecting said corrugations over the full depth thereof to define a continuous undulating sharpened cutting edge, and wherein said facets of said respective edges are substantially coplanar with each other.
Claim 6
Dependent Claim
98 words
A safety razor comprising blade support means and a pair of opposed blade means having respective sharpened cutting edges directed toward each other across a gap defined by said edges, wherein each said blade means has a longitudinally extending marginal edge portion formed with a series of corrugations each extending traversely to the length of said edge portion and said blade means further comprises a substantially planar facet intersecting said corrugations over the full depth thereof to define a continuous undulating sharpened cutting edge, and wherein said facets of said respective edges are substantially coplanar with each other.
Claim 7
Dependent Claim
143 words
A safety razor comprising blade support means and a pair of opposed blade means having respective sharpened cutting edges directed toward each other across a gap defined by said edges, wherein each said blade means has a longitudinally extending marginal edge portion formed with a series of corrugations each extending transversely to the length of said edge portion and said blade means further comprises a substantially planar facet intersecting said corrugations over the full depth thereof to define an undulating sharpened cutting edge, and wherein said facets of said respective edge means are substantially coplanar with each other, said safety razor further including a third blade means set behind one of said opposed blade means to form a tandem pair therewith, said third blade means having a marginal edge portion and sharpened cutting edge substantially identical to one of said opposed blade means.
Claim 8
Dependent Claim
143 words
A safety razor comprising blade support means and a pair of opposed blade means having respective sharpened cutting edges directed toward each other across a gap defined by said edges, wherein each said blade means has a longitudinally extending marginal edge portion formed with a series of corrugations each extending transversely to the length of said edge portion and said blade means further comprises a substantially planar facet intersecting said corrugations over the full depth thereof to define an undulating sharpened cutting edge, and wherein said facets of said respective edge means are substantially coplanar with each other, said safety razor further including a third blade means set behind one of said opposed blade means to form a tandem pair therewith, said third blade means having a marginal edge portion and sharpened cutting edge substantially identical to one of said opposed blade means.
References Cited (Backward Citations)
US2108267A
Cited
US2315785A
Cited
GB1119767A
Cited
US3494032A
Cited
GB1136449A
Cited
US3488764A
Cited
US3505734A
Cited
US3654701A
Cited
US3768162A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-04 | 1990-02-03 | 1990-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-04 | 1994-02-03 | 1994-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-04 | 1998-02-03 | 1998-08-05 | $7700.00 | Window Closed / Lapsed |