US2664220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating roof construction for tanks
Assignee: Standard Oil Co
•
Filing: 1950-10-23
•
Granted: 1953-12-29
•
Expires: 1970-10-23
Abstract
No abstract record available.
Inventors
- 👤 Howard O Cord
- 👤 Bruce G Merten
- 👤 Frank E Klapheke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:01
CPC Classifications
B; B65; B65D; B65D88/00; B65D88/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US956875A
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US1735461A
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US2008686A
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US2321058A
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US2366911A
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US2386022A
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US2430592A
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US2567920A
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US2538875A
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US2560586A
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US2550152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |