US4711740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions
Assignee: Lever Brothers Co
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Filing: 1986-05-23
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Granted: 1987-12-08
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Expires: 2006-05-23
Abstract
Abstract A detergent composition containing a detergent active, sodium carbonate and calcite also contains a copolymer to reduce deposition of insoluble material on fabrics. The copolymer is derived from a carboxylic monomer and a non-carboxylic monomer, with the non-carboxylic monomer being in excess. A 3:1 copolymer of sulphonated styrene and maleic anhydride is exemplified.
Inventors
- 👤 Malcolm N. A. Carter
- 👤 Reginald V. Scowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:01
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/378; C11D3/0005; C11D3/0036; C11D3/02; C11D3/04; C11D3/10; C11D3/12; C11D3/1233
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
93 words
A detergent composition comprising: (i) from 5 to 40% by weight of a detergent active material; (ii) from 10% to 40% by weight of a water-soluble carbonate material; (iii) from 5% to 60% of a water-insoluble carbonate material; and (iv) from 0.2% to 5% by weight of a copolymer of maleic anhydride and a monomer selected from the group consisting of sulfonated styrene and 2-acrylamido-2-methyl propane sulfonic acid, wherein the weight ratio of said monomer to said maleic anhydride is about 3:1, said copolymer having a molecular weight of between 1,000 and 500,000.
Claim 2
Dependent Claim
93 words
A detergent composition comprising: (i) from 5 to 40% by weight of a detergent active material; (ii) from 10% to 40% by weight of a water-soluble carbonate material; (iii) from 5% to 60% of a water-insoluble carbonate material; and (iv) from 0.2% to 5% by weight of a copolymer of maleic anhydride and a monomer selected from the group consisting of sulfonated styrene and 2-acrylamido-2-methyl propane sulfonic acid, wherein the weight ratio of said monomer to said maleic anhydride is about 3:1, said copolymer having a molecular weight of between 1,000 and 500,000.
Claim 3
Dependent Claim
13 words
The detergent composition according to claim 1 wherein the monomer is sulfonated styrene.
Claim 4
Dependent Claim
15 words
The detergent composition according to claim 1 wherein the water-insoluble carbonate material is calcium carbonate.
Claim 5
Dependent Claim
21 words
The detergent composition according to claim 3, wherein the calcium carbonate has a surface area of at least 5m 2 /g.
Claim 6
Dependent Claim
19 words
The detergent composition according to claim 1 wherein the copolymer has a molecular weight of between 5,000 and 100,000.
Claim 7
Dependent Claim
15 words
The detergent composition according to claim 2 wherein the water-insoluble carbonate material is calcium carbonate.
Claim 8
Dependent Claim
19 words
The detergent composition according to claim 2 wherein the copolymer has a molecular weight of between 5,000 and 100,000.
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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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |