US2690486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaker
Assignee: Heinemann Electric Co
•
Filing: 1951-06-26
•
Granted: 1954-09-28
•
Expires: 1971-06-26
Abstract
No abstract record available.
Inventors
- 👤 Kurt W Wilckens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:01
CPC Classifications
H; H01; H01H; H01H71/00; H01H71/10; H01H71/1009; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR656656A
Cited
US1923092A
Cited
US2072932A
Cited
US2360922A
Cited
US2372778A
Cited
US2277645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-27 | 1958-03-29 | 1958-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-27 | 1962-03-29 | 1962-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-27 | 1966-03-29 | 1966-09-28 | $7700.00 | Window Closed / Lapsed |