US 12,091,639 B1
Detergent sheets comprising activated charcoal with enhanced cleaning and stain removal efficacy
Jenna L. Arkin, Long Beach, CA (US); Ryan K. Hood, Huntington Beach, CA (US); Johanna Sandoval, Ontario, CA (US); Marlene Raigoza, Montebello, CA (US); and James W. Davis, Lacey, WA (US)
Assigned to Venus Laboratories, Inc., Cypress, CA (US)
Filed by Venus Laboratories, Inc., Cypress, CA (US)
Filed on Jan. 17, 2024, as Appl. No. 18/415,418.
Int. Cl. C11D 17/06 (2006.01); C11D 1/66 (2006.01); C11D 3/38 (2006.01); C11D 3/386 (2006.01)
CPC C11D 17/06 (2013.01) [C11D 1/66 (2013.01); C11D 3/38 (2013.01); C11D 3/38609 (2013.01); C11D 2111/12 (2024.01); C11D 2111/14 (2024.01)] 20 Claims
 
1. A laundry detergent sheet comprising:
a water-soluble matrix in sheet form, the water-soluble matrix comprising a solidified polymer mixture;
a detergent component bound and suspended by the water-soluble matrix, the detergent component comprising ionic and non-ionic surfactants, and 0.2%-5% enzymes wherein the enzymes are selected to break down certain molecules on soiled laundry;
activated charcoal, the activated charcoal comprising particulate carbon having a porous exterior surface and an average surface area of at least 950 m2/g, wherein the activated charcoal is embedded in the water-soluble matrix; and
wherein the water-soluble matrix is configured to release the detergent component and the activated charcoal when the water-soluble matrix contacts a sufficient volume of water such that the porous exterior surface of the activated charcoal adsorbs at least some of the molecules broken down by the enzymes.