Patent US2994774A successfully refreshed from Google Patents.
US2994774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole logging
Assignee: Gulf Research and Development Co
•
Filing: 1956-04-26
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Granted: 1961-08-01
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 William E Mott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:04
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; H; H05; H05H; H05H3/00; H05H3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2574655A
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US2763788A
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US2776378A
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US2769096A
Cited
US2689918A
Cited
US2735019A
Cited
US2914677A
Cited
US2842695A
Cited
US2901628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-31 | 1965-01-30 | 1965-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-31 | 1969-01-30 | 1969-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-31 | 1973-01-30 | 1973-08-01 | $7700.00 | Window Closed / Lapsed |