US2475933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Marine drilling rig
Assignee: Lee C Moore Corp
•
Filing: 1945-10-31
•
Granted: 1949-07-12
•
Expires: 1965-10-31
Abstract
No abstract record available.
Inventors
- 👤 Homer J Woolslayer
- 👤 Erwin A Campbell
- 👤 Jenkins Cecil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:55
CPC Classifications
E; E21; E21B; E21B15/00; E21B15/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US622459A
Cited
US1681533A
Cited
US1829304A
Cited
US2092511A
Cited
US2210408A
Cited
US2271578A
Cited
US2381446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-11 | 1953-01-10 | 1953-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-11 | 1957-01-10 | 1957-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-11 | 1961-01-10 | 1961-07-12 | $7700.00 | Window Closed / Lapsed |