Patent US2656810A successfully refreshed from Google Patents.
US2656810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hinged wheel-supported hatch cover
Assignee: SEABOARD MACHINERY Corp
•
Filing: 1948-02-07
•
Granted: 1953-10-27
•
Expires: 1968-02-07
Abstract
No abstract record available.
Inventors
- 👤 Karl W Jernstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:05
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US934456A
Cited
US1028263A
Cited
US1821595A
Cited
US1877361A
Cited
GB370653A
Cited
GB409231A
Cited
GB472670A
Cited
US2256087A
Cited
US2379623A
Cited
FR934456A
Cited
US2447906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |