US3025237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery using a water flooding technique
Assignee: Jersey Production Research Co
•
Filing: 1958-11-28
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Granted: 1962-03-13
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Expires: 1978-11-28
Abstract
No abstract record available.
Inventors
- 👤 Roper Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:46
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/588; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A METHOD OF RECOVERING OIL FROM OIL BEARING FORMATIONS, COMPRISING FLOODING THE OIL BEARING FORMATION WITH WATER CONTAINING A VISCOSITY THICKENING AGENT AN EFFECTIVE AMOUNT OF AN ALCOHOL ADDUCT OF A COPOLYMER OF A VINYL AROMATIC AND MALEIC ANHYDRIDE WHEREIN SAID ADDUCT COMPRISES A HALF ESTER.
Claim 2
Independent Claim
46 words
A METHOD OF RECOVERING OIL FROM OIL BEARING FORMATIONS, COMPRISING FLOODING THE OIL BEARING FORMATION WITH WATER CONTAINING A VISCOSITY THICKENING AGENT AN EFFECTIVE AMOUNT OF AN ALCOHOL ADDUCT OF A COPOLYMER OF A VINYL AROMATIC AND MALEIC ANHYDRIDE WHEREIN SAID ADDUCT COMPRISES A HALF ESTER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-12 | 1965-09-11 | 1966-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-12 | 1969-09-11 | 1970-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-12 | 1973-09-11 | 1974-03-13 | $7700.00 | Window Closed / Lapsed |