US2951891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery case construction
Assignee: Hamilton Watch Co
•
Filing: 1957-11-20
•
Granted: 1960-09-06
•
Expires: 1977-11-20
Abstract
No abstract record available.
Inventors
- 👤 Walter R Kempf
- 👤 Jr John W Rhyne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:53
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/102; H01M50/109; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2509249A
Cited
US2593893A
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US2495247A
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US2669597A
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US2798988A
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US2837593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |