US2774852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch
Assignee: Hart Manufacturing Co
•
Filing: 1953-11-13
•
Granted: 1956-12-18
•
Expires: 1973-11-13
Abstract
No abstract record available.
Inventors
- 👤 Raymond H Boardman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:57
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/08; H01H3/10; Y; Y10; Y10S; Y10S116/00; Y10S116/29; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7021; Y10T403/7022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2604583A
Cited
US2643903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |