US2931877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact device
Assignee: Individual
•
Filing: 1958-02-20
•
Granted: 1960-04-05
•
Expires: 1978-02-20
Abstract
No abstract record available.
Inventors
- 👤 Edward J Henley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:13
CPC Classifications
G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/053; G10H1/055; G10H1/0558
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US632156A
Cited
FR703923A
Cited
US2297772A
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US2430829A
Cited
US2528086A
Cited
US2601217A
Cited
US2740871A
Cited
US2740210A
Cited
US2867043A
Cited
US2752558A
Cited
US2852973A
Cited
US2848920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |