US3754329A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Razor blade with rf sputtered coating
Assignee: Warner Lambert Co LLC
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Filing: 1971-09-29
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Granted: 1973-08-28
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Expires: 1991-09-29
Abstract
Abstract The specific disclosure provides for a razor blade comprising at least one cutting edge portion defined by two face portions having a narrow included angle therebetween. At least a portion of each of the face portions has an RF sputtered coating of a hard metal having a thickness of less than about 600 Angstrom units. The disclosure also provides for coating the sputtered metal coating with a sputtered coating of an organic plastic material having a thickness of from about 200 to about 2000 Angstrom units.
Inventors
- 👤 G Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:59
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; H01J37/34; B; B05; B05D; B05D1/00; B05D1/62; B05D5/00; B05D5/08; B05D5/083; B26; B26B; B26B21/00; B26B21/54; C; C23; C23C; C23C14/00; C23C14/06; C23C14/12; C23C14/22; C23C14/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
28 words
A razor blade as defined in claim 1 in which said coating comprises a metal alloy having a thickness of from about 100 to about 600 Angstrom units.
Claim 2
Dependent Claim
20 words
A razor blade as defined in claim 2 in which said alloy is an alloy of nickel, iron and chromium.
Claim 3
Dependent Claim
18 words
A razor blade as defined in claim 1 in which said coating is an iron and carbon compound.
Claim 4
Dependent Claim
15 words
A razor blade as defined in claim 1 in which said coating consists of chromium.
Claim 5
Dependent Claim
21 words
A razor blade as defined in claim 5 in which said thickness is between about 100 and about 600 Angstrom units.
Claim 6
Dependent Claim
16 words
A razor blade as defined in claim 1 in which said coating is a hard metal.
Claim 7
Dependent Claim
21 words
A razor blade as defined in claim 7 in which said thickness is between about 100 and about 600 Angstrom units.
Claim 8
Dependent Claim
14 words
A razor blade as defined in claim 7 in which said metal is chromium.
Claim 9
Dependent Claim
16 words
A razor blade as defined in claim 1 in which said coating is a metallic oxide.
Claim 10
Dependent Claim
16 words
A razor blade as defined in claim 10 in which said metallic oxide is chromium oxide.
Claim 11
Dependent Claim
36 words
A razor blade as defined in claim 7 wherein said sputtered hard metal coating has thereon a sputtered coating of an organic plastic material having a thickness of from about 200 to about 2000 Angstrom units.
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |