US2477801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pressure switch
Assignee: Individual
•
Filing: 1945-05-19
•
Granted: 1949-08-02
•
Expires: 1965-05-19
Abstract
No abstract record available.
Inventors
- 👤 Claude M Hathaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:49
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34; H01H35/346
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2086264A
Cited
US708155A
Cited
US1684530A
Cited
US1829807A
Cited
US1782838A
Cited
US2103214A
Cited
US2111168A
Cited
US2229740A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-08-01 | 1953-01-31 | 1953-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-01 | 1957-01-31 | 1957-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-01 | 1961-01-31 | 1961-08-02 | $7700.00 | Window Closed / Lapsed |