Patents by Inventor Melvin J. G. Davidson

Melvin J. G. Davidson 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).

  • Ascorbate short-stops
    Patent number: 4242477
    Abstract: The polymerization of butadiene and styrene in an emulsion, free-radical polymerization process using a persulphate initiator is effectively short-stopped by the addition of ascorbic acid or the sodium or potassium salts thereof. The butadiene-styrene polymer so produced may be used in those end uses generally associated with the prior known use of such polymers.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: December 30, 1980
    Assignee: Polysar Limited
    Inventors: Ahti A. Koski, Melvin J. G. Davidson