US2320681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of analyzing earth formations
Assignee: Stanolind Oil and Gas Co
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Filing: 1940-05-21
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Granted: 1943-06-01
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Expires: 1960-05-21
Abstract
No abstract record available.
Inventors
- 👤 Hubert H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:42
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/24; G01N33/241; G01N9/00; G01N9/10; G01N9/12; G01N9/18; G01N9/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-05-31 | 1946-11-30 | 1947-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-31 | 1950-11-30 | 1951-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-31 | 1954-11-30 | 1955-06-01 | $7700.00 | Window Closed / Lapsed |