US3722090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard bar for safety razors
Assignee: Warner Lambert Co LLC
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Filing: 1971-08-12
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Granted: 1973-03-27
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Expires: 1991-08-12
Abstract
Abstract The disclosure is directed to a safety razor guard bar having a continuous guard bar surface positioned outwardly and below the cutting edge of a razor blade. The continuous guard bar surface is provided to fix the cutting angle of the blade, and to smooth and stretch the skin prior to its engagement with the cutting edge of the blade. The guard bar includes a plurality of ridges spaced along the upper surface thereof. Each of the ridges has an outer arcuate surface extending from the continuous guard bar surface upwardly and inwardly to beneath the blade such that the upper portion of each of the ridges is in close proximity to the cutting edge of the blade.
Inventors
- 👤 J Dawidowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:06
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/40; B26B21/08; B26B21/14; B26B21/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
A safety razor comprising means for exposing at least one blade cutting edge, and at least one elongAted guard; said guard including a continuous skin engaging outer surface portion positioned outwardly and downwardly from said cutting edge for smoothing and stretching a skin surface during shaving, and a plurality of spaced ridges, each one of said ridges extending upwardly and inwardly from said continuous outer surface portion of said guard to beneath and in close proximity to said cutting edge.
Claim 2
Dependent Claim
80 words
A safety razor comprising means for exposing at least one blade cutting edge, and at least one elongAted guard; said guard including a continuous skin engaging outer surface portion positioned outwardly and downwardly from said cutting edge for smoothing and stretching a skin surface during shaving, and a plurality of spaced ridges, each one of said ridges extending upwardly and inwardly from said continuous outer surface portion of said guard to beneath and in close proximity to said cutting edge.
Claim 3
Dependent Claim
26 words
The razor of claim 1 wherein each one of said ridges has an arcuate upper surface extending from said continuous outer surface portion of said guard.
Claim 4
Dependent Claim
29 words
The razor of claim 1 wherein said arcuate upper surface of each of said ridges extends to between about 0.007 inch and about 0.012 inch beneath said cutting edge.
Claim 5
Dependent Claim
42 words
The razor of claim 1 wherein said continuous outer surface portion of said guard is arcuately formed, and wherein said arcuate upper surface of each of said ridges is a contiguous continuation of said continuous arcuate outer surface portion of said guard.
Claim 6
Dependent Claim
32 words
The razor of claim 4, wherein said guard has upper arcuate surfaces intermediate said ridges, said guard bar upper arcuate surfaces having a radius of curvature less than that of said ridges.
Claim 7
Dependent Claim
22 words
The razor of claim 5, wherein each of said ridges has a pair of parallel sides perpendicularly extending upwardly from said guard.
Claim 8
Dependent Claim
37 words
The razor of claim 6 wherein each of said guard upper arcuate surfaces is about 2.8 times greater in length, taken along the longitudinal axis of said guard, than the distance between said pair of parallel sides.
Claim 9
Dependent Claim
40 words
The razor of 6 wherein each of said guard upper arcuate surfaces is about 0.154 inch in length takes along the longitudinal axis of said guard, and wherein the distance between said pair of parallel sides in about 0.055 inch.
Claim 10
Dependent Claim
40 words
The razor of 6 wherein each of said guard upper arcuate surfaces is about 0.154 inch in length takes along the longitudinal axis of said guard, and wherein the distance between said pair of parallel sides in about 0.055 inch.
Claim 11
Dependent Claim
20 words
The razor of claim 8 wherein at least five ridges are formed along said outer surface portion of said guard.
Claim 12
Dependent Claim
29 words
The razor of claim 5 wherein said arcuate upper surface of each of said ridges extends to between about 0.007 inch and about 0.012 inch beneath said cutting edge.
Claim 13
Dependent Claim
27 words
The razor of claim 1 wherein said continuous outer surface portion of said guard and said ridges each have serrations for contacting the skin surface during shaving.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |