US2510880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible coupling
Assignee: Individual
•
Filing: 1945-05-29
•
Granted: 1950-06-06
•
Expires: 1965-05-29
Abstract
No abstract record available.
Inventors
- 👤 Fredrikson Alf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:32
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US865997A
Cited
US924404A
Cited
US1169937A
Cited
US1265078A
Cited
US1548016A
Cited
US1909918A
Cited
US1980656A
Cited
US2120734A
Cited
US2077663A
Cited
US2125433A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |