Patent US3950277A successfully refreshed from Google Patents.
US3950277A
Expired / Lapsed
US
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Laundry pre-soak compositions
Assignee: Procter and Gamble Co
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Filing: 1973-07-25
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Granted: 1976-04-13
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Expires: 1993-07-25
Abstract
Abstract Compositions and methods for removing oily triglyceride stains from fabrics employing a lipase enzyme and a lipase activator selected from the group consisting of naphthalene sulfonates, certain polyoxyalkylene derivatives of ethylenediamine and certain acylamino acid salts. The lipase-plus-activator compositions are utilized to pre-soak soiled fabrics, which are subsequently laundered using conventional household equipment.
Inventors
- 👤 Robert Lee Stewart
- 👤 Homer Wallace McCune
- 👤 Francis Louvaine Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:46
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/38; C11D3/386; C11D3/38627
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
52 words
A laundry pre-soak composition for improved triglyceride stain removal comprising from about 0.01 to about 7.0% by weight of a lipase and from about 0.1 to about 70% by weight of a water-soluble lipase activator selected from the alkali metal salts and ammonium salts of isopropylnaphthalene sulfonate, methylnaphthalene sulfonate, or butylnaphthalene sulfonate.
Claim 2
Dependent Claim
52 words
A laundry pre-soak composition for improved triglyceride stain removal comprising from about 0.01 to about 7.0% by weight of a lipase and from about 0.1 to about 70% by weight of a water-soluble lipase activator selected from the alkali metal salts and ammonium salts of isopropylnaphthalene sulfonate, methylnaphthalene sulfonate, or butylnaphthalene sulfonate.
Claim 3
Dependent Claim
26 words
A composition according to claim 1 wherein the lipase enzyme is selected from the group consisting of Amano CE, Amano M-AP, Takeda 1969-4-9, and Meito MY-30.
Claim 4
Dependent Claim
18 words
A composition according to claim 1 comprising, in addition to lipase enzyme and a lipase activator, a surfactant.
Claim 5
Dependent Claim
40 words
A process for removing triglycerides from fabrics, comprising: soaking the fabric in the aqueous composition of claim 1 for a period of from at least 30 minutes; and thereafter laundering in an aqueous solution of soap or synthetic detergent composition.
Claim 6
Dependent Claim
28 words
A process according to claim 4 wherein the lipase enzyme is a member selected from the group consisting of Amano CE, Amano M-AP, Takeda 1969-4-9, and Meito MY-30.
Claim 7
Dependent Claim
13 words
A process according to claim 4 wherein the lipase enzyme is Amano M-AP.
References Cited (Backward Citations)
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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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |