Patent US2674967A successfully refreshed from Google Patents.
US2674967A
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US
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Ship's hatch construction
Assignee: MacGregor Comarain SA
•
Filing: 1949-07-02
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Granted: 1954-04-13
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 Bich Marcel
- 👤 Chavane Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:58
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/14; B63B19/19; B63B19/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB239619A
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US1768701A
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GB370653A
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GB409231A
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GB432925A
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GB466019A
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GB489218A
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US2256087A
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US2332306A
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US2379623A
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GB607163A
Cited
US2484286A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |