US2473371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making contacts
Assignee: Duracell Inc USA
•
Filing: 1945-12-29
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Granted: 1949-06-14
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Expires: 1965-12-29
Abstract
No abstract record available.
Inventors
- 👤 Robert C Heath
- 👤 Willis R Howe
- 👤 Walter E King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:17
CPC Classifications
H; H01; H01H; H01H11/00; H01H11/04; B; B23; B23K; B23K20/00; B23K20/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/49218
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-13 | 1952-12-13 | 1953-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-13 | 1956-12-13 | 1957-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-13 | 1960-12-13 | 1961-06-14 | $7700.00 | Window Closed / Lapsed |