US3944470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization and enhancement of enzymatic activity
Assignee: Procter and Gamble Co
•
Filing: 1973-06-29
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Granted: 1976-03-16
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Expires: 1993-06-29
Abstract
Abstract Enzyme-containing compositions having improved stability and enzymatic activity in aqueous medium, comprising an enzyme and certain aminated polysaccharides, such as aminated cellulose and aminated starch. Enzymatic detergent compositions comprising certain organic surface-active agents in combination with enzymes and aminated polysaccharides are disclosed as well.
Inventors
- 👤 Francis Louvaine Diehl
- 👤 Eugene Zeffren
- 👤 Edward John Milbrada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:10
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38663; C11D3/20; C11D3/22; C11D3/222; C11D3/227
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
An enzyme composition having improved activity and stability in aqueous solution comprising: a. an enzyme; and b. an aminated polysaccharide selected from cellulose, hydroxyethylcellulose, methyl cellulose or starch having from about 0.01% to about 2% by weight of nitrogen in its elemental composition, wherein the weight ratio of said aminated polysaccharide to said enzyme is in the range from about 500:1 to 1:1.
Claim 2
Dependent Claim
63 words
An enzyme composition having improved activity and stability in aqueous solution comprising: a. an enzyme; and b. an aminated polysaccharide selected from cellulose, hydroxyethylcellulose, methyl cellulose or starch having from about 0.01% to about 2% by weight of nitrogen in its elemental composition, wherein the weight ratio of said aminated polysaccharide to said enzyme is in the range from about 500:1 to 1:1.
Claim 3
Dependent Claim
28 words
A composition in accordance with claim 1 wherein the weight ratio of said enzyme to said aminated polysaccharide is in the range from about 1:100 to about 1:2.
Claim 4
Dependent Claim
23 words
A composition in accordance with claim 2 wherein the aminated polysaccharide is selected from the group consisting of aminated starch and aminated cellulose.
Claim 5
Dependent Claim
18 words
A composition in accordance with claim 3 wherein the enzyme is selected from EC classes 1 and 3.
Claim 6
Dependent Claim
64 words
A composition in accordance with claim 1 wherein the aminated polysaccharide is a reaction product of: a. an amine selected from the group consisting of trimethylamine; dimethylbutylamide; dimethylhexylamine; dimethyl dodecylamine; methyldiethylamine; methylethylbutylamine; diethylamine; dipropylamine; dibutylamine; ethyldecylamine; or methylnonylamine; with b. a compound selected from the group consisting of glycerol α,γ-dichlorohydrin and epichlorohydrin; and c. a polysaccharide selected from cellulose, hydroxyethylcellulose, methyl cellulose or starch.
Claim 7
Dependent Claim
24 words
A composition in accordance with claim 5 wherein the enzyme is selected from the group consisting of peroxidase-EC 1.11.1.7 and subtilopeptidase A EC 3.4.4.16.
References Cited (Backward Citations)
US3702804A
Cited
US3773674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |