Patents by Inventor Alkis Christofas

Alkis Christofas 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).

  • Synergistic primer for fluoropolymer coatings
    Patent number: 4179542
    Abstract: A primer coating containing, as the resin binder, a thermoplastic halogenated (at least partly fluorinated) ethylene polymer and a curable epoxy resin, and, as a filler pigment, finely-divided mica and metallic pigment powder, is disclosed herein. The primer coating gives fluoropolymer top coatings which have been simultaneously cured therewith unexpectedly high resistance to blistering and delamination when exposed to extreme conditions such as live steam under high pressure.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: December 18, 1979
    Assignee: Pennwalt Corporation
    Inventors: Alkis Christofas, Julius E. Dohany
  • Aqueous vinylidene fluoride polymer coating composition
    Patent number: 4128519
    Abstract: A water-based coating composition which may be air dried to form durable, fire resistant coatings includes dispersed vinylidene fluoride polymer particles, emulsified liquid epoxy resin and a dissolved emulsifying agent for said epoxy resin which agent is also capable of rapidly curing the epoxy resin upon removal of the water from the composition.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: December 5, 1978
    Assignee: Pennwalt Corporation
    Inventors: Edward J. Bartoszek, Alkis Christofas
  • Plastic laminate construction
    Patent number: 3993827
    Abstract: A ply formed of an outer layer of tetrafluoroethylene polymer impregnating the top surface of a flexible porous matrix and a vinylidene fluoride polymer impregnating the lower surface of said matrix, the vinylidene fluoride polymer surface of the ply being firmly adhered to a substrate of a vinylidene fluoride polymer, preferably reinforced with an embedded flexible porous matrix, to form a reinforced laminate construction.
    Type: Grant
    Filed: August 29, 1975
    Date of Patent: November 23, 1976
    Assignee: Pennwalt Corporation
    Inventors: Andrew A. Dukert, Alkis Christofas