US2443731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for logging boreholes
Assignee: Texaco Inc
•
Filing: 1943-11-27
•
Granted: 1948-06-22
•
Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 Herzog Gerhard
- 👤 Crumrine Kenncth Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:01
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/08; G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; G01V5/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2349712A
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US2220509A
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US2288718A
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US2345119A
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US2316361A
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US2351028A
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US2374197A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |