US3120320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas inflated seal for a floating roof storage tank
Assignee: Chicago Bridge and Iron Co
•
Filing: 1959-11-27
•
Granted: 1964-02-04
•
Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 Ivan L Wissmiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:24
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34; B65D88/42; B65D88/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1674038A
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US2050685A
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US2366911A
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US3059805A
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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) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |