Patent US2772548A successfully refreshed from Google Patents.
US2772548A
Expired / Lapsed
US
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Coupling
Assignee: EIDP Inc
•
Filing: 1955-04-07
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Granted: 1956-12-04
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Expires: 1975-04-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert A Covington
- 👤 Vincent H Waldin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:04
CPC Classifications
F; F16; F16D; F16D3/00; F16D3/16; F16D3/48; F16C; F16C1/00; F16C1/02; F16C1/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US934821A
Cited
US2603073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |