US2699042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable marine foundation for drilling rigs and method of operation
Assignee: Individual
•
Filing: 1949-06-25
•
Granted: 1955-01-11
•
Expires: 1969-06-25
Abstract
No abstract record available.
Inventors
- 👤 John T Hayward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:24
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027; E02B2017/0039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1681533A
Cited
US2237387A
Cited
US2327118A
Cited
US2430014A
Cited
US2515540A
Cited
US2589153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-10 | 1958-07-12 | 1959-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-10 | 1962-07-12 | 1963-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-10 | 1966-07-12 | 1967-01-11 | $7700.00 | Window Closed / Lapsed |