US2813160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Progressive push button switch
Assignee: Northrop Grumman Corp
•
Filing: 1955-02-21
•
Granted: 1957-11-12
•
Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Kay C Tong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:27
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/50; H01H13/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR958556A
Cited
US1004005A
Cited
US2289882A
Cited
US2469976A
Cited
US2485340A
Cited
US2621267A
Cited
US2695939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |