Patents Assigned to Polyplasma Incorporated
  • Process for modifying large polymeric surfaces
    Patent number: 5041303
    Abstract: The disclosure herein describes a process for modifying large polymeric surfaces; a thin, uniform coating is deposited at near ambient temperature on the surfaces in a large-volume plasma apparatus, the plasma state being produced by using electromagnetic energy in the microwave frequency range. The surfaces thus coated constitute a barrier against permeation by oxygen and moisture.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: August 20, 1991
    Assignee: Polyplasma Incorporated
    Inventors: Michael R. Wertheimer, Henry P. Schreiber