US2664838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent hinged bulkhead
Assignee: MH Detrick Co
•
Filing: 1951-03-12
•
Granted: 1954-01-05
•
Expires: 1971-03-12
Abstract
No abstract record available.
Inventors
- 👤 George C Sorensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:56
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/12; F27B3/16; F27D; F27D1/00; F27D1/0003; F27D1/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US678282A
Cited
US890175A
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US1034328A
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US1427862A
Cited
US1829159A
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US2045662A
Cited
US2561933A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |