US3070158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary recovery using a water flooding technique
Assignee: Jersey Production Research Co
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Filing: 1959-01-20
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Granted: 1962-12-25
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Expires: 1979-01-20
Abstract
No abstract record available.
Inventors
- 👤 Roper Robert
- 👤 Paul L Stright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
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
60 words
IN A METHOD OF RECOVERY OF OIL FROM OIL BEARING FORMATIONS, THE STEP OF FLOODING AN OIL BEARING FORMATION WITH WATER CONTAINING AS A VISCOSITY IMPROVING AGENT UP TO ABOUT ONE PERCENT OF AN AMINE ADDUCT OF A COPOLYMER OF MALEIC ANHYDRIDE AND AN ETHYLENICALLY UNSATURATED COMPOUND COPOLYMERIZABLE THEREWITH, SAID COPOLYMER HAVING A MOLECULAR WEIGHT IN EXCESS OF ABOUT 100,000.
Claim 2
Dependent Claim
60 words
IN A METHOD OF RECOVERY OF OIL FROM OIL BEARING FORMATIONS, THE STEP OF FLOODING AN OIL BEARING FORMATION WITH WATER CONTAINING AS A VISCOSITY IMPROVING AGENT UP TO ABOUT ONE PERCENT OF AN AMINE ADDUCT OF A COPOLYMER OF MALEIC ANHYDRIDE AND AN ETHYLENICALLY UNSATURATED COMPOUND COPOLYMERIZABLE THEREWITH, SAID COPOLYMER HAVING A MOLECULAR WEIGHT IN EXCESS OF ABOUT 100,000.
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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |