Patents by Inventor John D. Angerer

John D. Angerer 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).

  • Process of preparing high solids low viscosity polysaccharides
    Patent number: 5480984
    Abstract: Hydroxyethylcellulose (HEC), hydrophobically modified hydroxyethylcellulose (HMHEC), hydroxypropylcellulose (HPC), methylhydroxypropylcellulose (MHPC), carboxymethylhydroxyethylcellulose (CMHEC), guar, starch, xanthan, hydroxypropylguar (HP Guar) or carboxymethylhydroxypropylguar (CMHP Guar) are stepwise or continuously reacted with hydrogen peroxide to produce aqueous compositions with a solids content greater than 5% by weight at a viscosity at 25.degree. C. below 9500 mPa.s. It is preferred to use 30 to 50% hydrogen peroxide to depolymerize the polysaccharide.
    Type: Grant
    Filed: February 11, 1992
    Date of Patent: January 2, 1996
    Assignee: Aqualon Company
    Inventors: John D. Angerer, Jashawant J. Modi, Robert C. Szafranski
  • Perfluorinated alkyl hydrophobe hydroxyalkylcellulose associative thickeners
    Patent number: 5290829
    Abstract: A purified hydroxyethylcellulose (HEC) or hydroxypropylcellulose (HPC) reacts with a perfluorinated alkyl glycidyl ether to produce an associative thickener wherein a fluorinated C.sub.8 chain is nearly as effective as a hydrocarbyl C.sub.16 straight chain hydrophobe. A preferred glycidyl ether is prepared by reacting a terminal hydroxyl of a perfluorinated surfactant with epichlorohydrin.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: March 1, 1994
    Assignee: Aqualon Company
    Inventors: John D. Angerer, Thomas G. Majewicz, Makram H. Meshreki
  • Aqueous protective coating composition comprising 3-alkoxy-2-hydroxypropylhydroxyethylcellulose and film forming latex
    Patent number: 4902733
    Abstract: An aqueous protective coating composition comprising (a) a nonionic, water-soluble 3-alkoxy-2-hydroxypropylhydroxyethylcellulose wherein the alkyl moiety is a straight or branched chain alkyl group having 6 to 24 carbon atoms and (b) a film forming latex, is disclosed.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: February 20, 1990
    Assignee: Aqualon Company
    Inventor: John D. Angerer