Patents by Inventor Robert B. Wardle

Robert B. Wardle 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).

  • Method of producing thermoplastic elastomers having alternate crystalline structure for use as binders in high-energy compositions
    Patent number: 4806613
    Abstract: A method of preparing a thermoplastic elastomer having A blocks and at least one B block, wherein said A blocks are crystalline at temperatures below about 60.degree. C. and said B block(s) is amorphous at temperatures above about -20.degree. C., said A blocks each being polyethers derived from monomers of oxetane and its derivatives and/or tetrahydrofuran and its derivatives, the method comprisingproviding hydroxyl terminated A blocks which are crystalline at temperatures below about 60.degree. C. and separately providing hydroxyl terminated B blocks which are amorphous at temperatures above about -20.degree. C.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: February 21, 1989
    Assignee: Morton Thiokol, Inc.
    Inventor: Robert B. Wardle