# US 5,707,950 A · Detergent compositions containing lipase and protease

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- Number: US 5,707,950 A
- Document ID: US5707950A
- Status: Granted
- Kind: A
- Application number: 08/729,543
- Filed: 1996-10-11
- Granted: 1998-01-13
- Earliest claimed: 1994-11-18
- Assignees: The Procter & Gamble Company
- Inventors: Chandrika Kasturi; Andre Baeck; Ann Margaret Wolff
- Web page: https://patentgrep.com/patent/US5707950A

## CPC

- C12N 9/54: bacteria being Bacillus
- C11D 3/386: Preparations containing enzymes {, e.g. protease or amylase}
- C11D 3/38609: {Protease or amylase in solid compositions only}
- C11D 3/38627: {containing lipase}
- C12N: MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA (microbiological testing media C12Q1/00)
- C11D: DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL

## Abstract

The invention concerns laundry detergent compositions comprising lipase (especially the variant D96L of the native lipase derived from Humicola lanuginosa), protease, and surfactant, wherein said compositions comprise levels of lipase enzyme and protease enzyme such that the whitening performance of said compositions is increased. These compositions deliver an improved whiteness maintenance and/or dingy clean-up on fabrics.

## Claims

### Claim 1

A laundry detergent composition comprising:
(a) from about 0.001% to about 2% of a lipase enzyme variant D96L of the native lipase derived from Humicola lanuginosa strain D SM 4106;
(b) a protease enzyme selected from the group consisting of the Bacillus lentus subtilisin variant N76D/S103A/V104I according to the numbering of Bacillus amyloliquefaciens subtilisin at a level to provide from 0.005 to 0.1 AU per gram of composition; and
(c) from about 0.1% to about 60% of a surfactant;
and wherein further said compositions comprise levels of lipase enzyme and protease enzyme such that the whitening performance of said compositions is increased.

### Claim 2 (depends on 1)

A method for laundering fabrics to maintain whiteness and provide dingy cleanup, said method comprising contacting fabrics in need of whiteness and dingy clean-up with an aqueous solution comprising the laundry detergent composition according to claim 1, said aqueous solution comprising the lipase enzyme at a level of from about 150 to about 5000 LU per liter.