Patents by Inventor James R. Ruynon

James R. Ruynon 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).

  • Hydrophilic cationic copolymers of acrylamide or methacrylamide
    Patent number: 4696962
    Abstract: A cationic polymer composition suitable for use as a flocculating agent and as a retention aid and dewatering agent in paper making consists of a mixture of(a) a hydrophilic cationic polymer of(a.sub.1) acrylamide and/or methacrylamide and(a.sub.2) dialkylamino-C.sub.2-3 alkylene-(meth)acrylamidethe molar quantity of cationic monomer units (a.sub.2) being from 0.2 to 9 mol % of the total(b) an anionic surfactant(c) a water-immiscible oil in which the polymer (a) is insoluble, andoptionally (d) a lipophilic non-ionic surfactant,optionally (e) waterand optionally (f) an oil-miscible polar solvent.The compositions may be prepared by water-in-oil emulsion copolymerization and are readily diluted with water.
    Type: Grant
    Filed: July 24, 1984
    Date of Patent: September 29, 1987
    Assignee: Sandoz Ltd.
    Inventors: Bernard Danner, James R. Ruynon