Patents by Inventor Terrence P. Sullivan

Terrence P. Sullivan 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).

  • Stripper composition
    Patent number: 3980587
    Abstract: An aqueous solution for alkaline stripping of metallic surfaces having a resist coating on at least a portion of the surface thereof, the resist coating normally being based upon polyvinyl chloride, such as polyvinyl chloride contained in a base emulsion for a photo resist material. The alkaline stripper solution is based upon a mixture of potassium hydroxide and ammonium hydroxide, together with a chelating agent consisting of the sodium salts of ethylenediaminetetraacetic acid, acetic acid, and ethylene glycol monobutyl ether.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: September 14, 1976
    Assignee: G. T. Schjeldahl Company
    Inventor: Terrence P. Sullivan