P&G receives US patent for fabric-softening laundry detergent

Nevin Barich

ALEXANDRIA, Virginia , October 15, 2012 (press release) – United States Patent no. 8,283,306, issued on Oct. 9, was assigned to The Procter & Gamble Co. (Cincinnati).

"Fabric Softening Laundry Detergents with Good Stability" was invented by Raphael Emmanuel Guyot (Kobe, Japan), Marc Jennewein (Humbeek, Belgium) and James Charles Theophile Roger Burckett St. Laurent (Brussels).

According to the abstract released by the U.S. Patent & Trademark Office: "An aqueous laundry detergent composition in the form of a liquid or gel, having a pH of from about 6 to about 11 in a 1% water solution and containing a non-soap anionic surfactant; soap; nonionic surfactant; fabric softening cationic cosurfactant having a molecular weight of less than about 1000; fabric softening quaternized polymer having a molecular weight of at least 100,000; non-quaternized, non polyamine thickener; perfume microcapsules; wherein at least one of the following is true; i) the ratio by weight of nonionic surfactant to anionic surfactant is greater than 1 and the total percentage, by weight of the composition, of the total of anionic surfactant, nonionic surfactant and soap is from 10% to 30%; and/or ii) the aqueous laundry detergent composition further comprises from about 0.5% to about 5% of a hydrotrope. Methods of laundering with such compositions."

The patent was filed on May 28, 2009, under Application No. 12/473,483.

For further information please visit: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1&f=G&l=50&co1=AND&d=PTXT&s1=8283306&OS=8283306&RS=8283306

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