Patent US3676373A successfully refreshed from Google Patents.
US3676373A
Expired / Lapsed
US
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Detergent compositions
Assignee: Gulf Research and Development Co
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Filing: 1970-07-20
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Granted: 1972-07-11
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Expires: 1990-07-20
Abstract
Abstract Detergent compositions are disclosed which incorporate as a builder a water-soluble salt of a copolymer consisting of ethyl benzene and succinic acid groups in a 1:1 ratio and having a molecular weight of at least 3,000 and, optionally, a polyphosphate.
Inventors
- 👤 Stanley C Paviak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:49
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
19 words
A detergent composition in accordance with claim 1 in which the copolymer is made from styrene and maleic anhydride.
Claim 2
Dependent Claim
31 words
A detergent composition in accordance with claim 1 in which said salt of the copolymer composition constitutes at least about 20 percent of the total builder present in said detergent composition.
Claim 3
Dependent Claim
15 words
A detergent composition in accordance with claim 1 in which said polyphosphate is sodium tripolyphosphate.
Claim 4
Dependent Claim
30 words
A detergent composition in accordance with claim 1 in which the ratio of said builder material to said detergent surfactant is in the range of about 1:1 to about 5:1.
Claim 5
Dependent Claim
29 words
A detergent composition in accordance with claim 1 in which said salt of the copolymer composition constitutes aboUt 100 percent of the total builder present in said detergent composition.
Claim 6
Dependent Claim
17 words
A detergent composition in accordance with claim 1 having a pH between about 9.5 and about 11.5.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |