US3464492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for recovery of petroleum oil from confining structures
Assignee: Getty Oil Co
•
Filing: 1967-12-06
•
Granted: 1969-09-02
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Expires: 1987-12-06
Abstract
No abstract record available.
Inventors
- 👤 Robert H Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:50
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/20; C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; C09K8/592
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3123136A
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US2813583A
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US3101781A
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US3111984A
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US3333632A
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US3294164A
Cited
US3392782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-01 | 1973-03-03 | 1973-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-01 | 1977-03-03 | 1977-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-01 | 1981-03-03 | 1981-09-02 | $7700.00 | Window Closed / Lapsed |