US3345202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making razor blades
Assignee: Eversharp Inc
•
Filing: 1963-06-10
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Granted: 1967-10-03
•
Expires: 1983-06-10
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
2026-10-23 14:28
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A METHOD OF PRODUCING AN IMPROVED RAZOR BLADE WHICH COMPRISES APPLYING TO AT LEAST ONE PREFORMED AND PRESHARPENED CUTTING EDGE OF A FERROUS ALLOY, A THIN PLATING OF CHROMIUM, REHONING THE PLATED CUTTING EDGE AND THEREAFTER APPLYING TO THE CUTTING EDGE A RELATIVELY THIN, ADHERENT COATING OF POLYTETRAFLUOROETHYLENE.
Claim 2
Independent Claim
48 words
A METHOD OF PRODUCING AN IMPROVED RAZOR BLADE WHICH COMPRISES APPLYING TO AT LEAST ONE PREFORMED AND PRESHARPENED CUTTING EDGE OF A FERROUS ALLOY, A THIN PLATING OF CHROMIUM, REHONING THE PLATED CUTTING EDGE AND THEREAFTER APPLYING TO THE CUTTING EDGE A RELATIVELY THIN, ADHERENT COATING OF POLYTETRAFLUOROETHYLENE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |