Patents by Inventor Ervin Wolfram

Ervin Wolfram 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).

  • Partially saponified polyvinyl acetates and their application in the homo- and copolymerization of vinyl chloride
    Patent number: 4258163
    Abstract: This invention relates to novel partially saponified polyvinyl acetates with a degree of hydrolysis of 30 to 65 mole % which might be considered as vinyl alcohol-vinyl acetate block copolymers. The invention relates further to the application of said novel block copolymers as a pore-forming additive used together with at least one known protective colloid in the homo- and copolymerization of vinyl compounds, primarily of vinyl chloride in a pure aqueous medium.
    Type: Grant
    Filed: May 23, 1979
    Date of Patent: March 24, 1981
    Assignee: Borsodi Vegyi Kombinat
    Inventors: Bela Mariasi, Laszlo Molnar, Janos Toth, Imre Gulya, Miklos Nagy, Ervin Wolfram, Miklos Zrinyi, Gaborne Kovacs, Laszlone Jaksity