US2531424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for floating roof tanks
Assignee: Chicago Bridge and Iron Co
•
Filing: 1945-11-26
•
Granted: 1950-11-28
•
Expires: 1965-11-26
Abstract
No abstract record available.
Inventors
- 👤 Fred L Goldsby
- 👤 Clifford M Orr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:26
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE290443C
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CH94546A
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US1493344A
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US1660021A
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US1668792A
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US2297985A
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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) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |