Patents by Inventor Robert Rabinowitz

Robert Rabinowitz 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).

  • Controlled polymerization of dimethyldiallylammonium halides by the use of alkali metal or ammonium bisulfites or metabisulfites
    Patent number: 4092467
    Abstract: An alkali metal or ammonium bisulfite or metabisulfite added incrementally to a polymerizing aqueous solution of dimethyldiallylammonium halide enables control of the intrinsic viscosity of the resulting polymer within desired limits without adverse effect on monomer conversion.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: May 30, 1978
    Assignee: American Cyanamid Company
    Inventors: Richard P. Welcher, Robert Rabinowitz, Algird S. Cibulskas
  • Process for the high molecular weight polymers of diallyldimethylammonium fluoride polymers directly from diallyldimethylammonium fluoride monomer
    Patent number: 4064333
    Abstract: Under specified conditions of reaction, a substantially pure aqueous solution of diallyldimethylammonium fluoride monomer can be polymerized to provide corresponding polymers having an intrinsic viscosity of at least about 0.1 deciliter per gram measured in 1.0 N NaCl solutions.
    Type: Grant
    Filed: March 16, 1977
    Date of Patent: December 20, 1977
    Assignee: American Cyanamid Company
    Inventors: Robert Rabinowitz, Richard Parke Welcher
  • Stabilized Mannich base solutions
    Patent number: 3988277
    Abstract: Aqueous solutions of Mannich bases of polyvinylamides are stabilized against viscosity increase and gelation by addition thereto of an effective amount of a formaldehyde scavenger.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: October 26, 1976
    Assignee: American Cyanamid Company
    Inventors: Charles Richard Witschonke, Robert Rabinowitz