Patents by Inventor Joseph Simkin

Joseph Simkin 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).

  • Microencapsulated pyrethroids
    Patent number: 4670246
    Abstract: A sprayable insecticidal composition of low fish toxicity of a mixture in water of microcapsules comprised of a pyrethroid (synthetic pyrethrin) contained within an encapsulating wall of a cross-linked polymeric material, and methods of preparation and method of use of the composition on a wide variety of crops and aquatic sites infested with a broad spectrum of undesirable insects.
    Type: Grant
    Filed: April 24, 1985
    Date of Patent: June 2, 1987
    Assignee: Pennwalt Corporation
    Inventors: Gerd H. Dahl, Joseph Simkin
  • Microencapsulated naturally occuring pyrethrins
    Patent number: 4497793
    Abstract: A process for microencapsulating naturally-occurring pyrethrins with a polyamide-polyurea shell by interfacial condensation which includes slowly adding an amine reactant to an aqueous emulsion containing the pyrethrin, an isocyanate, and an acyl halide with the requirement that at least one of said isocyanate or said acyl halide is polyfunctional, to provide free flowing capsules having a polyamide-polyurea wall encapsulating the natural pyrethrin.
    Type: Grant
    Filed: February 25, 1983
    Date of Patent: February 5, 1985
    Assignee: Pennwalt Corporation
    Inventor: Joseph Simkin
  • High temperature coatings based on poly (zinc phosphinates)
    Patent number: 4001034
    Abstract: A high temperature coating composition composed of a solvent mixture of zinc chloride, titanium dioxide, and an organo-substituted phosphinic acid.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: January 4, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joseph Simkin
  • High temperature pigmented coatings based on zirconium phosphinate polymer binders crosslinked with phosphinic acids
    Patent number: 3966486
    Abstract: Improved coatings having resistance to high temperature degradation are obtained by modifying a zirconium phosphinate polymer with phosphinic acid and a pigment. Acrylate or alkyd resins may also be included in the formulation.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: June 29, 1976
    Assignee: Pennwalt Corporation
    Inventors: James Ping King, Joseph Simkin, Peter F. Radice
  • Freeze drying of seeds
    Patent number: 3950892
    Abstract: The process of freeze-drying vegetable, farm-crop, and flower seeds to increase storage life and germination rate of the seeds.
    Type: Grant
    Filed: December 3, 1974
    Date of Patent: April 20, 1976
    Assignee: Pennwalt Corporation
    Inventor: Joseph Simkin