Patents by Inventor Paul T. Shea

Paul T. Shea 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).

  • Patent number: 4970037
    Abstract: This invention relates to a process for preparing a photosensitive composition having a low heat history which includes:(a) forming a substantially homogeneous dispersion by mixing at least one photoinitiator or photoinitiating system, and at least one binder selected from the group consisting of reactive binders and non-reactive binders in the form of a dispersion provided that when said binder is non-reactive then at least one reactive component is added which is capable of reacting with the photoinitiator;(b) coagulating the dispersion to form a coagulum and a liquid; and(c) substantially removing the liquid to form a photosensitive composition.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: November 13, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Fred Y. Kafka, Paul T. Shea