US3451493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling apparatus and method
Assignee: JAMES C STORM
•
Filing: 1967-03-29
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Granted: 1969-06-24
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Expires: 1987-03-29
Abstract
Abstract 1,223,433. Subaqueous drilling. J. C. STORM. 2 Jan., 1968 [29 March, 1967], No. 48256/69. Divided out of 1,223,431. Heading E1F. The subject matter of this Specification is identical with that described in Specification 1,223,431 but the claims relate to the drilling platform
Inventors
- 👤 James C Storm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:25
CPC Classifications
E; E21; E21B; E21B15/00; E21B15/02; E21B19/00; E21B19/14; E21B19/143; E21B19/15; E21B19/155; E21B7/00; E21B7/04; E21B7/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2848196A
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US3004612A
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US3212593A
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US3252527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |