US3402468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polytetrafluoroethylene coated razor blade
Assignee: Eversharp Inc
•
Filing: 1967-09-29
•
Granted: 1968-09-24
•
Expires: 1987-09-29
Abstract
No abstract record available.
Inventors
- 👤 Marie S Kiss
- 👤 Richard C Hess
- 👤 Edward G Tajkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:31
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; B; B05; B05D; B05D3/00; B05D3/14; B05D3/141; B05D3/142; B05D5/00; B05D5/08; B05D5/083; B05D5/086; B26; B26B; B26B21/00; B26B21/54; B26B21/58; B26B21/60; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/18; C23C10/00; C23C10/60; C23C14/02; C23C14/58; C23C14/5806; B05D2258/00; B05D2258/02; B05D2350/00; B05D2350/60; B05D2350/65; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/932; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
A RAZOR BLADE COMPOSED OF A FERROUS ALLOY BASE METAL AND HAVING AT LEAST ONE CUTTING EDGE WHICH IS CHROMIUM-PLATED AND THE CHROMIUM PLATE COATED WITH A THIN ADHERING COATING OF POLYTETRAFLUORETHYLENE.
Claim 2
Dependent Claim
32 words
A RAZOR BLADE COMPOSED OF A FERROUS ALLOY BASE METAL AND HAVING AT LEAST ONE CUTTING EDGE WHICH IS CHROMIUM-PLATED AND THE CHROMIUM PLATE COATED WITH A THIN ADHERING COATING OF POLYTETRAFLUORETHYLENE.
References Cited (Backward Citations)
US1383176A
Cited
US1770157A
Cited
US3071856A
Cited
US3224094A
Cited
US3258319A
Cited
US3245577A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-24 | 1972-03-25 | 1972-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-24 | 1976-03-25 | 1976-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-24 | 1980-03-25 | 1980-09-24 | $7700.00 | Window Closed / Lapsed |