Patents by Inventor Inella Gatlin Shepard

Inella Gatlin Shepard 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).

  • Hydroxy terminated polybutadiene based polyurethane bound propellant grains
    Patent number: 4098626
    Abstract: Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: July 4, 1978
    Assignee: Thiokol Corporation
    Inventors: William Hardin Graham, Inella Gatlin Shepard