Patents by Inventor Robert Piller

Robert Piller 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).

  • Developer for positive photolithographic articles
    Patent number: 4379830
    Abstract: An improved aqueous alkaline developer for imagewise-exposed positive-acting photolithographic articles comprising a basic substance wherein the improvement comprises addition of a neutral salt of an alkali metal cation to the developer.
    Type: Grant
    Filed: October 6, 1981
    Date of Patent: April 12, 1983
    Assignee: Polychrome Corporation
    Inventors: Albert S. Deutsch, Christopher F. Lyons, Robert Piller