Patents by Inventor Roland Righetti

Roland Righetti 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).

  • Cationic ampholytic tetrapolymers and cosmetic compositions containing them
    Patent number: 4590249
    Abstract: The invention relates to new cationic ampholytic water-soluble tetrapolymers for cosmetic compositions for treating keratinous fibers and resulting from copolymerization of:a moles of acrylamide, AAM,b moles of 2-acrylamido-2-methyl-propane sulfonic acid, AMPS,b moles of a basic monomer selected from the three following monomers: dimethylaminoethyl acrylate, ADAME, N-(3-dimethylamino-1-propyl) acrylamide, DMAPA, N-(3-dimethylamino-1-propyl) methacrylamide, DMAPMA, c moles of a cationic monomer selected from the four following monomers:N,N,N-3-trimethylacrylamido-propanaminium chloride, APTAC,N,N,N-3-trimethylmethacrylamido-propanaminium chloride, MAPTAC,N,N,N-2-trimethylacryloyloxy-ethanaminium chloride, CMA, dimethylaminoethyl acrylate hydrochloride, CHA, with the following relations:a+2b+c=10030<a<7510<b<255<c<20.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: May 20, 1986
    Assignee: Societe Francaise Hoechst
    Inventors: Jean Cabestany, Daniel Siegel, Roland Righetti