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Patent US3776310A successfully refreshed from Google Patents.
US3776310A
Expired / Lapsed
US
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Polyalkeneoxides and polyvinyl-pyrrolidones mobility control agent and process
Assignee: Marathon Oil Co
•
Filing: 1971-05-06
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Granted: 1973-12-04
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Expires: 1991-05-06
Abstract
Abstract In a supplemented oil recovery process and other uses, flow resistance of aqueous polyalkeneoxide solutions, e.g., Polyox WRS-301, can be increased by adding high molecular weight homopolymers, or random block or heteropolymers of polyvinylpyrrolidones.
Inventors
- 👤 C Norton
- 👤 D Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:47
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/588; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
34 words
A process according to claim 1 wherein the aqueous solution contains from about 10 to about 5,000 parts per million of polyethylene oxide and about 10 to about 5,000 parts per million of polyvinylpyrrolidone.
Claim 2
Dependent Claim
34 words
A process according to claim 2 wherein the solution contains from about 200 to about 500 parts per million of polyethylene oxide and from about 10 to about 300 parts per million of polyvinylpyrrolidone.
Claim 3
Dependent Claim
15 words
A process according to claim 1 wherein the polyvinylpyrrolidone has a molecular weight above 100,000.
Claim 4
Dependent Claim
16 words
A process according to claim 1 wherein said polyethylene oxide has a molecular weight above 100,000.
Claim 5
Dependent Claim
29 words
A process according to claim 1 wherein said polyethylene oxide has a concentration of 0.01 to about 1 percent by weight based on the weight of the total solution.
Claim 6
Dependent Claim
29 words
A process according to claim 1 wherein said polyethylene oxide has a concentration of 0.02 to about 0.2 percent by weight based on the weight of the total solution.
References Cited (Backward Citations)
US2335454A
Cited
US3116791A
Cited
US3018826A
Cited
US3085063A
Cited
US3398094A
Cited
US3634305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |