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US4318818A
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Stabilized aqueous enzyme composition
Assignee: Procter and Gamble Co
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Filing: 1980-10-30
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Granted: 1982-03-09
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Expires: 2000-10-30
Abstract
Abstract Stabilized aqueous enzyme compositions contain a stabilizing system comprising calcium ions and a low molecular weight carboxylic acid or salt, preferably a formate, preferably with a low molecular weight alcohol, and in a pH range of from about 6.5 to about 10. Most preferred is a detergent composition containing the stabilized enzymes.
Inventors
- 👤 James C. Letton
- 👤 Mark J. Yunker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:06
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38663
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
193 words
A stabilized aqueous enzyme composition consisting essentially of; (a) from 0% to about 75% of a detergent surfactant selected from the group consisting of nonionic, anionic, cationic, zwitterionic, amphoteric and semipolar nonionic surfactants and mixtures thereof; (b) from about 0.025 to about 10% pure enzyme selected from the group consisting of proteolytic and amylolytic enzymes and mixtures thereof; (c) from 0 to about 60% of a low molecular weight primary or secondary alcohol selected from the group consisting of methanol, ethanol, propanol, isopropanol, polyols containing from 2 to about 6 carbon atoms and from 2 to about 6 hydroxy groups and mixtures thereof; (d) from about 0.1% to about 10% of a short chain length carboxylic acid salt selected from the group consisting of formates, acetates, propionates and mixtures thereof; (e) a soluble calcium salt to give from about 0.1 to about 10 millimoles of calcium ion per liter; and (f) the balance water, the pH of the product being from about 6.5 to about 10, the amount of calcium ion per liter being less than about 2 millimoles at pH's below about 8.5, and at pH's above 8.5, (d) is a formate.
Claim 2
Dependent Claim
193 words
A stabilized aqueous enzyme composition consisting essentially of; (a) from 0% to about 75% of a detergent surfactant selected from the group consisting of nonionic, anionic, cationic, zwitterionic, amphoteric and semipolar nonionic surfactants and mixtures thereof; (b) from about 0.025 to about 10% pure enzyme selected from the group consisting of proteolytic and amylolytic enzymes and mixtures thereof; (c) from 0 to about 60% of a low molecular weight primary or secondary alcohol selected from the group consisting of methanol, ethanol, propanol, isopropanol, polyols containing from 2 to about 6 carbon atoms and from 2 to about 6 hydroxy groups and mixtures thereof; (d) from about 0.1% to about 10% of a short chain length carboxylic acid salt selected from the group consisting of formates, acetates, propionates and mixtures thereof; (e) a soluble calcium salt to give from about 0.1 to about 10 millimoles of calcium ion per liter; and (f) the balance water, the pH of the product being from about 6.5 to about 10, the amount of calcium ion per liter being less than about 2 millimoles at pH's below about 8.5, and at pH's above 8.5, (d) is a formate.
Claim 3
Dependent Claim
55 words
The composition of claim 1 containing from about 5% to about 15% of said alcohol; from about 0.3% to about 3% of said carboxylic acid salt; and from about 0.1 to about 2 millimoles of calcium ion per liter, the pH being from about 7.5 to about 8.5 and said enzyme being a proteolytic enzyme.
Claim 4
Dependent Claim
28 words
The composition of claim 2 wherein the alcohol is selected from the group consisting of methanol, ethanol, propanol, ethylene glycol, propylene glycol, glycerine and isopropanol, and mixtures thereof.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein the carboxylic acid salt is a formate.
Claim 6
Dependent Claim
20 words
The composition of claim 3 wherein the surfactant is present in an amount of from about 20% to about 50%.
Claim 7
Dependent Claim
17 words
The composition of claim 3 wherein the detergent surfactant is a mixture of anionic and nonionic surfactants.
Claim 8
Dependent Claim
17 words
The composition of claim 3 wherein the detergent surfactant is a mixture of nonionic and cationic surfactants.
Claim 9
Dependent Claim
18 words
The composition of claim 3 wherein the detergent surfactant is a mixture of nonionic and semi-polar nonionic surfactants.
Claim 10
Dependent Claim
19 words
The composition of claim 3 wherein the alcohol is ethyl alcohol and the carboxylic acid salt is a formate.
Claim 11
Dependent Claim
21 words
The composition of claim 4 wherein the detergent surfactant is present at a level of from about 20% to about 40%.
Claim 12
Dependent Claim
20 words
The composition of claim 10 wherein the formate is present at a level of from about 0.5% to about 1.5%.
Claim 13
Dependent Claim
60 words
The composition of claim 3 wherein the proteolytic enzyme is present at a level of from about 0.05% to about 0.2% to give a level of enzyme activity of from about 15 to about 60 Anson units per liter, wherein the enzyme has an isoelectric point of at least about 8.5, and wherein the carboxylic acid salt is a formate.
Claim 14
Dependent Claim
20 words
The composition of claim 12 wherein the surfactant is present at a level of from about 20% to about 50.
Claim 15
Dependent Claim
11 words
The composition of claim 13 wherein the alcohol is ethyl alcohol.
Claim 16
Dependent Claim
149 words
A stabilized aqueous enzyme composition consisting essentially of; (a) from 0% to about 75% of a detergent surfactant selected from the group consisting of nonionic, anionic, cationic, zwitterionic, amphoteric and semipolar nonionic surfactants and mixtures thereof; (b) from about 0.025 to about 10% pure enzyme selected from the group consisting of proteolytic and amyolytic enzymes and mixtures thereof; (c) from 0 to about 60% of a low molecular weight primary or secondary alcohol selected from the group consisting of methanol, ethanol, propanol, isopropanol, polyols containing from 2 to about 6 carbon atoms and from 2 to about 6 hydroxy groups and mixtures thereof; (d) from about 0.1% to about 10% of a formate; (e) a soluble calcium salt to give from about 0.1 to about 10 millimoles of calcium ion per liter; and (f) the balance water, the pH of the product being from about 6.5 to about 10.
Claim 17
Dependent Claim
149 words
A stabilized aqueous enzyme composition consisting essentially of; (a) from 0% to about 75% of a detergent surfactant selected from the group consisting of nonionic, anionic, cationic, zwitterionic, amphoteric and semipolar nonionic surfactants and mixtures thereof; (b) from about 0.025 to about 10% pure enzyme selected from the group consisting of proteolytic and amyolytic enzymes and mixtures thereof; (c) from 0 to about 60% of a low molecular weight primary or secondary alcohol selected from the group consisting of methanol, ethanol, propanol, isopropanol, polyols containing from 2 to about 6 carbon atoms and from 2 to about 6 hydroxy groups and mixtures thereof; (d) from about 0.1% to about 10% of a formate; (e) a soluble calcium salt to give from about 0.1 to about 10 millimoles of calcium ion per liter; and (f) the balance water, the pH of the product being from about 6.5 to about 10.
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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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |