Patents by Inventor Donald J. Roach

Donald J. Roach 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).

  • Use of desiccant to control edge fusion in dry film photoresist
    Patent number: 4680248
    Abstract: Disclosed is a method for controlling edge fusion in a laminate of an aqueous developable photoresist composition sandwiched between a film support and a protective cover sheet comprising maintaining the relative humidity below about 20% in the environment surrounding the laminate, preferentially achieved by packaging the photoresist with a desiccant in a moisture proof container.
    Type: Grant
    Filed: August 19, 1985
    Date of Patent: July 14, 1987
    Assignee: Hercules Incorporated
    Inventor: Donald J. Roach