US3031997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating platform
Assignee: Individual
•
Filing: 1957-04-30
•
Granted: 1962-05-01
•
Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 William A Nesbitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:48
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027; B; B63; B63B; B63B21/00; B63B21/50; B63B35/00; B63B35/44; B63B35/4413; B63B1/00; B63B1/02; B63B1/04; B63B2001/044; E02B2017/0056; E02B2017/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2777669A
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US2753415A
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US2817212A
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US2939291A
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US2889795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |