US3412563A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: SONAT OFFSHORE DRILLING Inc
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Filing: 1967-01-03
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Granted: 1968-11-26
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Expires: 1987-01-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank W Sharp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:18
CPC Classifications
E; E02; E02B; E02B17/00; E02B2017/0052; E02B2017/0056; E02B2017/0073; E02B2017/0082; Y; Y10; Y10T; Y10T137/00; Y10T137/6198; Y10T137/6253; Y10T137/6362; Y10T137/6416; Y10T137/6525; Y10T137/7722; Y10T137/7837; Y10T137/7869; Y10T137/7871; Y10T137/7904; Y10T137/7908; Y10T137/7909
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |