US2687221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic mine car coupling
Assignee: DESSIE TURNER
•
Filing: 1950-01-03
•
Granted: 1954-08-24
•
Expires: 1970-01-03
Abstract
No abstract record available.
Inventors
- 👤 Dewey O Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:39
CPC Classifications
B; B61; B61G; B61G1/00; B61G1/36; B61G1/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US252316A
Cited
US428928A
Cited
US487632A
Cited
US584519A
Cited
US584650A
Cited
US587452A
Cited
US1847806A
Cited
US2509459A
Cited
US2582747A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |