Patent US2511267A successfully refreshed from Google Patents.
US2511267A
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US
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Bulkhead door structure
Assignee: ThyssenKrupp Budd Co
•
Filing: 1945-10-09
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Granted: 1950-06-13
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Expires: 1965-10-09
Abstract
No abstract record available.
Inventors
- 👤 Ellis L Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:14
CPC Classifications
E; E05; E05C; E05C9/00; E05C9/06; E05C9/063; E05B; E05B63/00; E05B63/0052; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/0848; Y10T292/0849; Y10T292/0853
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US229905A
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US797768A
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US1258234A
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US2140570A
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US2216012A
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US2209060A
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US2234776A
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US2179495A
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US2355025A
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US2378119A
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US2383435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |