US3079995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Petroleum recovery from subsurface oil-bearing formation
Assignee: Richfield Oil Corp
•
Filing: 1958-04-16
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Granted: 1963-03-05
•
Expires: 1978-04-16
Abstract
No abstract record available.
Inventors
- 👤 Manley L Natland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:31
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/2403; Y; Y10; Y10S; Y10S376/00; Y10S376/90; Y10S376/904; Y10S376/911
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2830944A
Cited
US2743224A
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US2780449A
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US2832732A
Cited
US2788071A
Cited
FR1147517A
Cited
US2858890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-04 | 1966-09-03 | 1967-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-04 | 1970-09-03 | 1971-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-04 | 1974-09-03 | 1975-03-05 | $7700.00 | Window Closed / Lapsed |