US2937222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary dry cell
Assignee: Hamilton Watch Co
•
Filing: 1957-01-22
•
Granted: 1960-05-17
•
Expires: 1977-01-22
Abstract
No abstract record available.
Inventors
- 👤 Walter R Kempf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:57
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/102; H01M50/109; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1996982A
Cited
US2174437A
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US2262836A
Cited
US2580664A
Cited
US2617863A
Cited
US2636063A
Cited
US2812377A
Cited
US2837593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |