Patent US2660736A successfully refreshed from Google Patents.
US2660736A
Expired / Lapsed
US
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Flotation equipment
Assignee: Owens Corning
•
Filing: 1945-07-19
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Granted: 1953-12-01
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Expires: 1965-07-19
Abstract
No abstract record available.
Inventors
- 👤 Lawrence P Biefeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/11; B63C9/115
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2349909A
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US2258221A
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US2433847A
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US2384384A
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US2436304A
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US2390370A
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US2428591A
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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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |