US4463152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylamide acrylate copolymers
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1982-12-29
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Granted: 1984-07-31
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Expires: 2002-12-29
Abstract
Abstract The present invention relates to a composition of water soluble copolymers of acrylamide and alkyl poly(etheroxy)acrylate which are excellent viscosification agents.
Inventors
- 👤 Donald N. Schulz
- 👤 John J. Maurer
- 👤 Jan Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:04
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F220/28; C08F220/285; C08F220/286; C08F220/52; C08F220/54; C08F220/56
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
75 words
A water soluble copolymer having the formula which comprises: ##STR6## wherein R 1 is selected from the group consisting of C 1 to C 20 alkyl groups, C 6 to C 20 aryl groups and C 6 to C 30 alkylaryl groups; R 2 is hydrogen or a methyl group, n is about 1 to 60; y is about 0.010 to about 5.00 mole %, and x is about 95.00 to about 99.99 mole %.
Claim 2
Dependent Claim
75 words
A water soluble copolymer having the formula which comprises: ##STR6## wherein R 1 is selected from the group consisting of C 1 to C 20 alkyl groups, C 6 to C 20 aryl groups and C 6 to C 30 alkylaryl groups; R 2 is hydrogen or a methyl group, n is about 1 to 60; y is about 0.010 to about 5.00 mole %, and x is about 95.00 to about 99.99 mole %.
Claim 3
Dependent Claim
20 words
A copolymer according to claim 1 wherein R is an alkylaryl group having about 1 to about 25 carbon atoms.
Claim 4
Dependent Claim
16 words
A copolymer according to claim 1 wherein the intrinsic viscosity is about 1 to about 25.
Claim 5
Dependent Claim
34 words
A copolymer according to claim 1 wherein n is about 1 to about 40, y is about 0.01 mole % to 3.00 mole %, and x is about 97.00 to about 99.99 mole %.
Claim 6
Dependent Claim
10 words
A water soluble copolymer of acrylamide/0.01 mole % nonylphenoxy poly(etheroxy)acrylate.
Claim 7
Dependent Claim
10 words
A water soluble copolymer of acrylamide/0.01 mole % nonylphenoxy poly(etheroxy)acrylate.
Claim 8
Dependent Claim
9 words
A water soluble of acrylamide/0.3 mole % nonylphenoxy poly(etheroxy)acrylate.
Claim 9
Dependent Claim
9 words
A water soluble of acrylamide/0.3 mole % nonylphenoxy poly(etheroxy)acrylate.
Claim 10
Dependent Claim
10 words
A water soluble copolymer of acrylamide/3.0 mole % nonylphenoxy poly(etheroxy)acrylate.
Claim 11
Dependent Claim
10 words
A water soluble copolymer of acrylamide/3.0 mole % nonylphenoxy poly(etheroxy)acrylate.
Claim 12
Dependent Claim
29 words
A copolymer according to claim 1 wherein said copolymer is soluble in water at a concentration level up to about 0.5 grams of copolymer per 100 grams of water.
Claim 13
Dependent Claim
45 words
A copolymer according to claim 1 wherein said copolymer is soluble in salt water at a concentration level up to about 0.5 grams of copolymer per 100 grams of the salt water, said salt water having about 1 to 10 wt.% of sodium chloride therein.
References Cited (Backward Citations)
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US3629209A
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US3988305A
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US4323463A
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EP0063018B1
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |