US2446303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging apparatus
Assignee: Geophysical Research Corp
•
Filing: 1943-11-27
•
Granted: 1948-08-03
•
Expires: 1963-11-27
Abstract
No abstract record available.
Inventors
- 👤 John E Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:38
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2192404A
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US2221951A
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US2376168A
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US2248982A
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US2266071A
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US2206894A
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US2347794A
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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) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |