US2969648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile drilling platform and method of operation
Assignee: Bethlehem Steel Corp
•
Filing: 1956-12-27
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Granted: 1961-01-31
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Expires: 1976-12-27
Abstract
No abstract record available.
Inventors
- 👤 Eberhardt C Rechtin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:32
CPC Classifications
E; E02; E02B; E02B17/00; E02B17/02; E02B17/027; E02B17/021; E02B17/04; E02B17/08; E02B17/0836; E02B17/0854; E02B2017/0056; E02B2017/0073; E02B2017/0086; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44068; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1553
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2675681A
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US1922747A
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US2657540A
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US2591225A
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US2603068A
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US2597691A
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US2652693A
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US2589146A
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US2771747A
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US2775869A
Cited
FR1105948A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |