US2678840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft coupling
Assignee: COFFING HOIST Co
•
Filing: 1952-02-20
•
Granted: 1954-05-18
•
Expires: 1972-02-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Coffing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:14
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/02; F16D1/04; F16D1/05; F16D1/033; F16D1/06; F16D1/08; F16D1/0876; F16D1/09; F16D1/093; F16D1/095; F16B; F16B2200/00; F16B2200/50; F16B2200/506
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1088892A
Cited
US2401536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-17 | 1957-11-16 | 1958-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-17 | 1961-11-16 | 1962-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-17 | 1965-11-16 | 1966-05-18 | $7700.00 | Window Closed / Lapsed |