US2223768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making razor heads
Assignee: Martin Brothers Electric Co
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Filing: 1938-07-30
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Granted: 1940-12-03
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Expires: 1958-07-30
Abstract
No abstract record available.
Inventors
- 👤 Wendell L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:27
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/60; B21D53/64; B21D53/645; B26; B26B; B26B19/00; B26B19/38; B26B19/384; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/496; Y10T428/00; Y10T428/12; Y10T428/12188; Y10T428/12194; Y10T428/12201; Y10T428/12229; Y10T428/12354; Y10T428/12361; Y10T428/1241
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) | 1943-12-03 | 1944-06-03 | 1944-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-12-03 | 1948-06-03 | 1948-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-12-03 | 1952-06-03 | 1952-12-03 | $7700.00 | Window Closed / Lapsed |