US3480083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waterflood process using organic phosphate esters
Assignee: ChampionX LLC
•
Filing: 1968-03-27
•
Granted: 1969-11-25
•
Expires: 1988-03-27
Abstract
No abstract record available.
Inventors
- 👤 Donald C Oleen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:32
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/528; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2246726A
Cited
US3033889A
Cited
US3032500A
Cited
US3258071A
Cited
US3191676A
Cited
US3378489A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |