US2680559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotative driving coupler
Assignee: Individual
•
Filing: 1949-11-02
•
Granted: 1954-06-08
•
Expires: 1969-11-02
Abstract
No abstract record available.
Inventors
- 👤 Wayne J Morrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:54
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/05; F04D29/056; F04D29/057; F04D29/66; F04D29/661; F04D29/668
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1888499A
Cited
US2041555A
Cited
US2164744A
Cited
US2023111A
Cited
US2032900A
Cited
US2290011A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |