Patents by Inventor John C. Heiman

John C. Heiman 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).

  • Stabilized acrylic monomer compositions
    Patent number: 5130471
    Abstract: A stabilized acrylic monomer composition is provided in which polymerization of the monomer is inhibited during transport and storage as well as during the distillation process for purifying or separating the acrylic monomer. The compositions of the present invention comprise three components: an acrylic monomer (A), phenothiazine (B), and a cyclic amine having at least one hydroxyl group (C).
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: July 14, 1992
    Inventors: John C. Heiman, Jerald W. Darlington