US2788104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control apparatus for electromagnetic friction clutch
Assignee: Machinery Electrification Inc
•
Filing: 1952-10-17
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Granted: 1957-04-09
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Expires: 1972-10-17
Abstract
No abstract record available.
Inventors
- 👤 James A Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:52
CPC Classifications
H; H02; H02P; H02P29/00; H02P29/0016; H02P29/0027; F; F16; F16D; F16D48/00; F16D48/06; F16D48/064; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1022; F16D2500/104; F16D2500/10443; F16D2500/1045; F16D2500/30; F16D2500/302; F16D2500/3028; F16D2500/304; F16D2500/30406; F16D2500/3042; F16D2500/30426; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/70418; F16D2500/7042; F16D2500/70422; F16D2500/70426; F16D2500/706; F16D2500/70668
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190604849A
Cited
US1814424A
Cited
US2470103A
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US2393701A
Cited
US2469706A
Cited
US2523046A
Cited
US2449779A
Cited
US2609181A
Cited
US2747710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |