US3237694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine drilling method and apparatus
Assignee: —
•
Filing: —
•
Granted: 1966-03-01
•
Expires: 1983-03-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:38
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B7/128; E21B15/00; E21B15/02; E21B19/00; E21B19/002; E21B19/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US285628A
Cited
US987266A
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US2239531A
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US2606003A
Cited
US2909359A
Cited
US2854215A
Cited
US2923531A
Cited
US3012610A
Cited
US3032125A
Cited
US3145775A
Cited
US3159218A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |