Patents by Inventor Walter D. Custer

Walter D. Custer 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).

  • Process for treating selected areas of a surface with solder
    Patent number: 4064287
    Abstract: Highly durable coatings are formed by the photopolymerization of screen printing inks containing aryloxyalkyl acrylate monomers or prepolymers, a polymerizable diluent and a free-radical initiating system, such inks having a viscosity of 5,000 to 200,000 centipoises and a thixotropic index of from 1 to 6. The photopolymerizable inks are useful for coating substrates, such as printed circuits, and serve as solder masks and resists for electroless plating, electroplating and etching.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: December 20, 1977
    Assignee: Dynachem Corporation
    Inventors: Melvin A. Lipson, Dale W. Knoth, Walter D. Custer, Michael N. Gilano
  • Photopolymerizable screen printing inks for permanent coatings prepared from aryloxyalkyl compositions
    Patent number: 4003877
    Abstract: Highly durable coatings are formed by the photopolymerization of screen printing inks containing aryloxyalkyl acrylate monomers or prepolymers, a polymerizable diluent and a free-radical initiating system, such inks having a viscosity of 5,000 to 200,000 centipoises and a thixotropic index of from 1 to 6. The photopolymerizable inks are useful for coating substrates, such as printed circuits, and serve as solder masks and resists for electroless plating, electroplating and etching.
    Type: Grant
    Filed: May 24, 1974
    Date of Patent: January 18, 1977
    Assignee: Dynachem Corporation
    Inventors: Melvin A. Lipson, Dale W. Knoth, Walter D. Custer, Michael N. Gilano