US3407042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well testing method
Assignee: Chevron USA Inc
•
Filing: 1965-06-24
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Granted: 1968-10-22
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Expires: 1985-06-24
Abstract
No abstract record available.
Inventors
- 👤 Loren W Slentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:37
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/005; C; C09; C09K; C09K8/00; C09K8/02; C09K8/04; C09K8/14; C09K8/16; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/109163; Y10T436/17; Y10T436/173076
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2195798A
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US2207348A
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US2348639A
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US2553900A
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US3003856A
Cited
US3173293A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |