US2554221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically actuated roller clutch
Assignee: General Electric Co
•
Filing: 1950-02-25
•
Granted: 1951-05-22
•
Expires: 1970-02-25
Abstract
No abstract record available.
Inventors
- 👤 Hugh M Stephenson
- 👤 Wyval M Rowan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:49
CPC Classifications
F; F16; F16D; F16D41/00; F16D41/06; F16D41/064; F16D41/066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2300223A
Cited
US2410818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |