Patents by Inventor Raphael J. Schweri

Raphael J. Schweri 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).

  • Process for the preparation of poly (vinylphenol) from poly (acetoxystyrene)
    Patent number: 4689371
    Abstract: Polymers of 4-acetoxystyrene are hydrolyzed by methanolysis with quaternary ammonium hydroxides to poly-p-vinylphenol. Such polymers are useful in photoresists and in the manufacture of metal treatment compositions.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: August 25, 1987
    Assignee: Celanese Corporation
    Inventors: Jimmy D. Elmore, Raphael J. Schweri