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Patent US2902636A successfully refreshed from Google Patents.
US2902636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording system
Assignee: United Geophysical Corp
•
Filing: 1953-11-12
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Granted: 1959-09-01
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Expires: 1973-11-12
Abstract
No abstract record available.
Inventors
- 👤 Frank B Coker
- 👤 Otto W Schoenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:22
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/02; G01R33/10; G01V; G01V3/00; G01V3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1504031A
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US2105247A
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US2220881A
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US2208125A
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US2404806A
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US2502108A
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GB638147A
Cited
US2611803A
Cited
US2472944A
Cited
US2777112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |