US2677935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine drilling platform
Assignee: Signal Oil and Gas Co
•
Filing: 1950-02-11
•
Granted: 1954-05-11
•
Expires: 1970-02-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Schaufele
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:11
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/025; E21; E21B; E21B15/00; E21B15/02; E02B2017/0056; E02B2017/0073; E02B2017/0086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2187871A
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US2171672A
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US2422168A
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US2534480A
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US2581098A
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US2591599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |