Patents by Inventor Douglas Woodruff, deceased

Douglas Woodruff, deceased 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).

  • Rubber vulcanizing agents comprising reaction products of sulfur and unsaturated hydrocarbons
    Patent number: 4740559
    Abstract: Reaction products of sulfur with an unsaturated reactant selected from d-limonene, 5-ethylidene-2-norbornene, styrene, and dicyclopentadiene, reacted at a temperature above the melting point of sulfur and below 159.degree. C. until chemically combined, then further reacted above the melting point of sulfur until solidified. The resulting products serve as vulcanizing agents when compounded with rubber. The unvulcanized rubber compounds exhibit less blooming and better adhesion to a variety of substrates than rubber compositions compounded with soluble or insoluble sulfur. Vulcanizates containing the present compositions and a method for increasing the adhesion of rubber to a substrate during a vulcanization process are also disclosed.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: April 26, 1988
    Assignee: Morton Thiokol, Inc.
    Inventors: Anders H. Johansson, Stephen K. Flanders, Douglas Woodruff, deceased, James L. Swigert