US2957525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guide assembly for washover pipe
Assignee: Noble Drilling Corp
•
Filing: 1957-02-11
•
Granted: 1960-10-25
•
Expires: 1977-02-11
Abstract
No abstract record available.
Inventors
- 👤 George E Kemnitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:01
CPC Classifications
E; E21; E21B; E21B31/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2051713A
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US2107716A
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US2218496A
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US2621067A
Cited
US2542679A
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US2647008A
Cited
US2710654A
Cited
US2804927A
Cited
US2762438A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |