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Ex Parte JEFFREY et al - Page 2
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Board of Patent Appeals and Interferences > 2001 > Ex Parte JEFFREY et al - Page 2
Appeal No. 1999-2518
Application 08/722,213
characteristics, and to a washing method using such a detergent
composition. Claims 20 and 11 are illustrative:
20. A detergent composition comprising:
(a) a water-soluble builder;
(b) an enzyme; and
(c) organic peroxyacid bleach source;
wherein a means is provided for delaying the release to a
wash liquor of the enzyme relative to the release of the water-
soluble builder such that in the T50 test method the time to
achieve a concentration that is 50% of the ultimate concentration
of the water-soluble builder is less than 60 seconds, and the
time to achieve a concentration that is 50% of the ultimate
concentration of the enzyme is more than 90 seconds, and further
wherein a means is provided for delaying the release of the
peroxyacid bleach such that in the T50 test method, the time to
achieve a concentration that is 50% of the ultimate concentration
of the peroxyacid bleach is more than 180 seconds.
11. A washing method comprising the steps of:
(1) applying an enzyme-free solution of a composition
containing a water-soluble builder to a soiled substrate;
(2) allowing said solution to remain in contact with
said soiled substrate for a period of time from 10 seconds to
1800 seconds; and
(3) washing said soiled substrate in a wash liquor
comprising from 0.000001% to 0.01%, by weight, active enzyme.
THE REFERENCES
Van Kralingen et al. (Van Kralingen) 5,114,611 May 19, 1992
De Cupere 5,456,855 Oct. 10, 1995
(§ 102(e) date Jun. 15, 1993)
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Last modified: November 3, 2007
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