US2831448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hatch cover
Assignee: Individual
•
Filing: 1953-11-17
•
Granted: 1958-04-22
•
Expires: 1973-11-17
Abstract
No abstract record available.
Inventors
- 👤 George E Suderow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:03
CPC Classifications
B; B63; B63B; B63B19/00; B63B19/12; B63B19/14; B63B19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1112009A
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US1126380A
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GB158323A
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US1714460A
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US1824910A
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US2194012A
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US2301568A
Cited
GB564809A
Cited
US2656810A
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DE836608C
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FR1022796A
Cited
US2707928A
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FR1034395A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |