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
2026-10-30 18:22
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US934456A
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US1028263A
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US1821595A
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US1877361A
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GB370653A
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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 |