Patent US5771478A successfully refreshed from Google Patents.
Patent US1971990A successfully refreshed from Google Patents.
US1971990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical apparatus
Assignee: Albert and JM Anderson Manufacturing Co
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Filing: 1931-06-09
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Granted: 1934-08-28
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Expires: 1951-06-09
Abstract
No abstract record available.
Inventors
- 👤 Charles H Reynolds
- 👤 George H Tryder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:07
CPC Classifications
H; H01; H01R; H01R13/00; H01R13/66; H01R13/70; H01R13/703; H01R13/7036
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1937-08-27 | 1938-02-26 | 1938-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-08-27 | 1942-02-26 | 1942-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-08-27 | 1946-02-26 | 1946-08-28 | $7700.00 | Window Closed / Lapsed |