Patent US2681552A successfully refreshed from Google Patents.
US2681552A
Expired / Lapsed
US
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Flexible coupling
Assignee: Individual
•
Filing: 1949-03-12
•
Granted: 1954-06-22
•
Expires: 1969-03-12
Abstract
No abstract record available.
Inventors
- 👤 Gordon L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:55
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/16; F16D3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1109006A
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US1103716A
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US1128430A
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US1231249A
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US1346253A
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US1411468A
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US1577575A
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US1861365A
Cited
US2441052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |