Patent US3682795A successfully refreshed from Google Patents.
US3682795A
Expired / Lapsed
US
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Sputter coating of razor blades with a beta-tungsten type alloy
Assignee: Gillette Co LLC
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Filing: 1969-07-28
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Granted: 1972-08-08
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Expires: 1989-07-28
Abstract
Abstract A RAZOR BLADE HAS A FILM (IN THE RANGE OF 100-400 A. IN THICKNESS) OF AN ALLOY OF A NOBLE METAL AND A STRENGTHENING METAL ON ITS CUTTING EDGE, THIS NOBLE METAL ALLOY FILM BEING AT LEAST AS HARD AS THE UNDERLYING BLADE METAL AND RESISTANT TO CORROSION BY A CONCENTRATED HYDROCHLORIC ACID.
Inventors
- 👤 Irwin W Fischbein
- 👤 Ben H Alexander
- 👤 Aiyaswami Sastri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:42
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/54; C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C23C14/165; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/1284; Y10T428/12861; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |