Patent US4217419A successfully refreshed from Google Patents.
Patent US3719647A successfully refreshed from Google Patents.
US3719647A
Expired / Lapsed
US
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New polymers and detergent compositions containing them
Assignee: Procter and Gamble Co
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Filing: 1971-01-25
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Granted: 1973-03-06
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Expires: 1991-01-25
Abstract
Abstract New copolymers of acrylic and methyl acrylic acid (I) with acrylic and methacrylic acid - ethylene oxide condensates (II). The components have formulas: I. CH2 C(R)COOM II. CH2 C(R)COO(C2H4O)nH wherein R is H or CH3; M is H, alkali metal, ammonium or amine; and n is at least one. The preferred ratio of (I) to (II) is about 2:1 and n is preferably from 20 to 100. These compounds are mixed with surface-active agents to form built detergents. They are most effective as whiteness maintenance agents when added to a detergent composition at a 0.1 to 5 percent level by weight of the final product.
Inventors
- 👤 F Hardy
- 👤 P Robson
- 👤 P Speakman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:54
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761; C08; C08F; C08F220/00; C08F220/02; C08F220/04; C08F220/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A water-soluble copolymer which results from reacting a first compound having the formula CH2 C(R)COOM with a second compound having the formula CH2 C(R)COO (C2H4O)nH wherein R is selected from the group consisting of H and CH3, M is selected from the group consisting of H, alkali metal, and ammonium, and n is an integer representing a mean value in the range of from about 5 to about 100, the weight proportion of said first compound to said second compound being in the range of from about 1:1 to 5:1.
Claim 2
Dependent Claim
90 words
A water-soluble copolymer which results from reacting a first compound having the formula CH2 C(R)COOM with a second compound having the formula CH2 C(R)COO (C2H4O)nH wherein R is selected from the group consisting of H and CH3, M is selected from the group consisting of H, alkali metal, and ammonium, and n is an integer representing a mean value in the range of from about 5 to about 100, the weight proportion of said first compound to said second compound being in the range of from about 1:1 to 5:1.
Claim 3
Dependent Claim
23 words
The copolymers of claim 1 wherein the R of the first compound is H and the R of the second compound is CH3.
Claim 4
Dependent Claim
12 words
The copolymers of claim 1 wherein n is from 20 to 100.
Claim 5
Dependent Claim
11 words
The copolymers of claim 1 wherein M is an alkali metal.
Claim 6
Dependent Claim
11 words
The copolymers of claim 4 wherein the alkali metal is sodium.
Claim 7
Dependent Claim
14 words
The copolymer of claim 1 having a molecular weight of from 30,000 to 200,000.
Claim 8
Dependent Claim
29 words
The copolymer of claim 1 wherein the first compound is acrylic acid and the second compound is a polyoxyethylene glycol methacrylate wherein the mean value of n is 90.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |