US2904977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction clutch
Assignee: Spinnbau GmbH
•
Filing: 1957-04-11
•
Granted: 1959-09-22
•
Expires: 1977-04-11
Abstract
No abstract record available.
Inventors
- 👤 Caspari Hans Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:31
CPC Classifications
F; F16; F16D; F16D7/00; F16D7/02; F16D7/021; F16D1/00; F16D1/06; F16D1/08; F16D1/0852; F16D1/0864; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US601297A
Cited
US793601A
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US1300748A
Cited
US1601438A
Cited
US2760800A
Cited
DE926102C
Cited
US2793515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |