US2939291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anchoring system for floating drill structure
Assignee: California Research LLC
•
Filing: 1955-06-06
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Granted: 1960-06-07
•
Expires: 1975-06-06
Abstract
No abstract record available.
Inventors
- 👤 Glenn A Schurman
- 👤 Ray E Kidder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:45
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/50; B63B21/502
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |