US2916923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Escapement for timer switch
Assignee: Duracell Inc USA
•
Filing: 1956-05-08
•
Granted: 1959-12-15
•
Expires: 1976-05-08
Abstract
No abstract record available.
Inventors
- 👤 Charles S Smith
- 👤 Harold T Simmons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:57
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/101; H01H43/102; G; G04; G04B; G04B13/00; G04B13/002; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1502; Y10T74/1503; Y10T74/1508; Y10T74/1518; Y10T74/1523; Y10T74/1558; Y10T74/1565; Y10T74/1566; Y10T74/1568; Y10T74/1569; Y10T74/1571; Y10T74/21; Y10T74/2133; Y10T74/2136
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US414335A
Cited
US433205A
Cited
US585726A
Cited
FR621691A
Cited
US2208831A
Cited
US2555408A
Cited
US2744413A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |