Patents by Inventor Stan Lem

Stan Lem has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Homopolymers prepared from ammonium quaternary salts of aminoalkylacrylamides
    Patent number: 5863526
    Abstract: The present invention is directed to a hair conditioning composition comprising as the active ingredient, a homopolymer of the formula. ##STR1## wherein R.sub.1 is hydrogen or methyl;R.sub.2 and R.sub.3 are independently lower alkyl;R.sub.4 is C.sub.2 -C.sub.25 alkyl or aryl group;n is 1-6; andX is lower alkyl sulfate or aryl sulfonate and to the use thereof for treating hair.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: January 26, 1999
    Assignee: Rhone-Poulenc, Inc.
    Inventors: Dominic Wai Kwing Yeung, Stan Lem, Fred Robinson, Michael Prendergast