Patents by Inventor Robert F. Gerhardt

Robert F. Gerhardt 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 acryloyloxyethoxymethyl-melamines
    Patent number: 4847336
    Abstract: The transetherification reaction between hydroxyethyl acrylate and hexamethoxymethyl-melamine to produce oligomeric acryloyloxyethoxymethyl-melamines, which can be polymerized to form useful films and castings, can be increased in rate to produce the oligomer having less impurities and other undesirable properties by running the reaction in a hydrocarbon solvent, such as hexane, in the presence of iodine.
    Type: Grant
    Filed: April 28, 1988
    Date of Patent: July 11, 1989
    Assignee: Ulano Corporation
    Inventor: Robert F. Gerhardt
  • Hardener composition
    Patent number: 4655841
    Abstract: A stable hardener composition for films of poly (vinyl alcohol) or poly (vinyl acetate) which preferably comprises an alkanol solution containing about 5 to 80% by weight of an aliphatic dialdehyde-bis (di-lower alkyl acetal), from 0 to about 1% by weight of water, and from about one to 30% by weight of the amount of said acetal of a strong Bronsted or Lewis acid, said alkanol being a primary alcohol containing 1 to 6 carbon atoms. The solution may also contain soluble thickening agents and dyes.
    Type: Grant
    Filed: April 9, 1985
    Date of Patent: April 7, 1987
    Assignee: Ulano Corporation
    Inventor: Robert F. Gerhardt