US2740549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating roof seals
Assignee: J C WYNNE
•
Filing: 1950-07-14
•
Granted: 1956-04-03
•
Expires: 1970-07-14
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Graham
- 👤 Saunders S Staley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:28
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)
US1514116A
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US1509218A
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US1816124A
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US1900904A
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US1994477A
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GB487774A
Cited
US2159346A
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US2402253A
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US2538067A
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US2495742A
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US2519633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-03 | 1959-10-03 | 1960-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-03 | 1963-10-03 | 1964-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-03 | 1967-10-03 | 1968-04-03 | $7700.00 | Window Closed / Lapsed |