Patents Represented by Attorney H. P. Price

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  • 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
  • Process for the ammonium hydroxide hydrolysis of polymers of acetoxystyrene to polymers of vinylphenol
    Patent number: 4678843
    Abstract: Polymers of 4-acetoxystyrene are hydrolyzed to polymers of p-vinylphenol with ammonium hydroxide followed by sparging with carbon dioxide. Such polymers are useful in photoresist and as protective coatings for metal.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: July 7, 1987
    Assignee: Celanese Corporation
    Inventors: Jimmy D. Elmore, Elizabeth S. Goff