US4451385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agent for reducing detergent irritation to skin and eyes
Assignee: Colgate Palmolive Co
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Filing: 1982-03-15
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Granted: 1984-05-29
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Expires: 2002-03-15
Abstract
Abstract A liquid detergent composition containing an anionic surfactant and a minor amount of a water-soluble, positively charged, partially hydrolyzed, protein fraction containing a high concentration of basic amino acids, having an isoionic point greater than 7 and a Bloom gel value of zero which counters the irritation caused by said anionic surfactant without reducing its foaming and detergency properties.
Inventors
- 👤 Edward A. Tavss
- 👤 Edward Eigen
- 👤 Kenneth F. Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:52
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/33; A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/65; A61Q; A61Q5/00; A61Q5/02; C11D3/38; C11D3/384
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
65 words
A water-soluble, partially hydrolyzed protein fraction having an isoionic point greater than 7, a Bloom gel value of zero and a molecular weight of about 600 to 12,000, obtained by extraction from a partially hydrolyzed protein mixture and isolation by ion exchange treatment with an anion exchange resin using an optimum weight ratio of resin to partially hydrolyzed protein of approximately 20:1 followed by dialysis.
Claim 2
Dependent Claim
65 words
A water-soluble, partially hydrolyzed protein fraction having an isoionic point greater than 7, a Bloom gel value of zero and a molecular weight of about 600 to 12,000, obtained by extraction from a partially hydrolyzed protein mixture and isolation by ion exchange treatment with an anion exchange resin using an optimum weight ratio of resin to partially hydrolyzed protein of approximately 20:1 followed by dialysis.
Claim 3
Dependent Claim
77 words
A substantially non-irritating, liquid, detergent composition comprising an aqueous vehicle containing 10% to 50% by weight of a water-soluble, anionic surfactant and about 0.2-5% by weight of a partially hydrolyzed, protein fraction having an isoionic point greater than 7, a Bloom gel value of zero and a molecular weight of about 600 to 12,000 obtained by extraction from a partially hydrolyzed protein mixture and isolation by ion exchange treatment with an anion exchange resin followed by dialysis.
Claim 4
Dependent Claim
77 words
A substantially non-irritating, liquid, detergent composition comprising an aqueous vehicle containing 10% to 50% by weight of a water-soluble, anionic surfactant and about 0.2-5% by weight of a partially hydrolyzed, protein fraction having an isoionic point greater than 7, a Bloom gel value of zero and a molecular weight of about 600 to 12,000 obtained by extraction from a partially hydrolyzed protein mixture and isolation by ion exchange treatment with an anion exchange resin followed by dialysis.
Claim 5
Dependent Claim
20 words
A liquid detergent composition according to claim 2, where said protein fraction has an isoionic point of 7 to 11.
Claim 6
Dependent Claim
22 words
A liquid detergent composition according to claim 3 wherein said anionic detergent contains a sulfonate or sulfate group in its molecular structure.
Claim 7
Dependent Claim
23 words
A liquid detergent composition according to claim 4 wherein said protein fraction is present in a concentration of 0.7% to 1.3% by weight.
Claim 8
Dependent Claim
121 words
A method of preparing the protein fraction of claim 1 which comprises the steps of (a) adjusting the pH of an aqueous partially hydrolyzed collagen protein mixture having a molecular weight of about 600 to 12,000 to the range of 8 to 12; (b) treating the mixture of step (a) with an anionic ion exchange resin using an optimum weight ratio of said resin to said mixture of approximately 20:1 in order to absorb negatively charged groups from the protein onto the resin and to substitute the negatively charged groups from said resin therefor; (c) dialyzing the mixture from step (b) to remove said resin-substituted negatively charged groups; and (d) recovering said protein fraction having a pI point greater than 7.
Claim 9
Dependent Claim
41 words
A method according to claim 6, wherein said anion exchange resin is a strongly basic anion exchange resin, said resin is maintained in a column and said treatment step (b) consists of flowing the mixture of step (a) through said column.
Claim 10
Dependent Claim
33 words
A method according to claim 7 which includes, in addition, the step of dialyzing said hydrolyzed, collagen protein mixture prior to treatment with the anion exchange resin to remove salts and other impurities.
Claim 11
Dependent Claim
18 words
A method according to claim 7, wherein step (d) consists of freeze drying said mixture from step (c).
Claim 12
Dependent Claim
26 words
A liquid detergent composition according to claim 2 wherein said ion exchange treatment employs an optimum ratio of said resin to said mixture of approximately 20:1.
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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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |