Patents by Inventor Theodore F. Schaaf

Theodore F. Schaaf 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).

  • Antistatic and antitack coating for circuit devices
    Patent number: 4720741
    Abstract: In an electronic device assembly comprising at least one circuit element an encapsulant therefor, wherein the encapsulant comprises a silicone resin characterized in that subsequent to the curing of said encapsulant, the resin is coated with a fine inorganic powder such as fumed or fused silica which essentially eliminates static charge and tackiness of the surface.
    Type: Grant
    Filed: June 26, 1986
    Date of Patent: January 19, 1988
    Assignee: American Telephone and Telegraph Company, AT&T Technologies, Inc.
    Inventors: Theodore F. Schaaf, Ching-Ping Wong
  • Additive processing electroless metal plating using aqueous photoresist
    Patent number: 4574031
    Abstract: In a method for making a printed circuit board employing an aqueous type photoresist and including etching of the substrate surface with chromic acid after application of the photoresist mask, chromium is washed from the surface with a reducing agent at a pH of .ltoreq.10.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: March 4, 1986
    Assignee: AT&T Technologies, Inc.
    Inventors: John K. Dorey, II, James T. Huneke, Bruce S. Madsen, Theodore F. Schaaf
  • Plating method using expandable masking bed
    Patent number: 4507330
    Abstract: A process of reacting a selective area of an article with a heated liquid, such as by immersion in a heated electroless plating bath, utilizes a holder which is particularly suitable for use in retaining a plurality of printed circuit boards to be immersed in an electroless plating bath. The holder comprises a rigid base and a heat expandable foam bed mounted to the base, the foam bed having slits therein into which the printed circuit board is placed and held. Upon immersion of the article, the foam bed thermally expands to mask the article from the bath in the areas covered by the bed.
    Type: Grant
    Filed: August 22, 1983
    Date of Patent: March 26, 1985
    Assignee: AT&T Technologies, Inc.
    Inventor: Theodore F. Schaaf
  • Method of treating an electroplating solution comprising ions of gold and cyanide prior to electroplating and thermocompression bonding
    Patent number: 4167240
    Abstract: A method of treating a solution comprising ions of gold and cyanide is disclosed. The method comprises treating the solution with metallic gold to precipitate therefrom metallic silver.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: September 11, 1979
    Assignee: Western Electric Company, Inc.
    Inventor: Theodore F. Schaaf