Patents by Inventor Howard Chu

Howard Chu 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).

  • Low temperature active aliphatic aromatic polycarbodiimides
    Patent number: 5008363
    Abstract: A mixed aliphatic/aromatic polycarbodiimide prepared by first polymerizing an aliphatic isocyanate or mixture thereof, optionally in the presence of a polyfunctional isocyanate; arresting polymer chain growth by reaction with a stoichiometrically deficient amount of a monofunctional isocyanate-reactive compound, followed by further polymerization with an aromatic diisocyanate.
    Type: Grant
    Filed: March 23, 1990
    Date of Patent: April 16, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Charles B. Mallon, Howard Chu