US3500922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flooding process using a substantially anhydrous soluble oil
Assignee: Union Oil Company of California
•
Filing: 1968-09-03
•
Granted: 1970-03-17
•
Expires: 1988-09-03
Abstract
No abstract record available.
Inventors
- 👤 Leo J O'brien
- 👤 Le Roy W Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:18
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3292696A
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US3163214A
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US3266570A
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US3249157A
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US3297085A
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US3324944A
Cited
US3356138A
Cited
US3343597A
Cited
US3412791A
Cited
US3406754A
Cited
US3437141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-16 | 1973-09-15 | 1974-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-16 | 1977-09-15 | 1978-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-16 | 1981-09-15 | 1982-03-17 | $7700.00 | Window Closed / Lapsed |