Patent US1902471A successfully refreshed from Google Patents.
US1902471A
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Electromagnetic clutch
Assignee: General Electric Co
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Filing: 1929-09-03
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Granted: 1933-03-21
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Expires: 1949-09-03
Abstract
No abstract record available.
Inventors
- 👤 Thomson Elihu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:06
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/06; F16D48/00; F16D48/06; F16D48/064; F16D2027/002; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1022; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/70418; F16D2500/7042; F16D2500/70422; F16D2500/70426
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) | 1936-03-20 | 1936-09-19 | 1937-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-03-20 | 1940-09-19 | 1941-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-03-20 | 1944-09-19 | 1945-03-21 | $7700.00 | Window Closed / Lapsed |