Patents by Inventor Wendell R. Conard

Wendell R. Conard 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).

  • Vulcanizable polymeric compositions containing a zinc dimethacrylate adjuvant and method for preparing the adjuvant
    Patent number: 4713409
    Abstract: Vulcanizable polymeric compositions comprising certain rubbery polymers or polymer blends, a zinc dimethacrylate adjuvant having a surface area of from about 3.7 to about 5.4 m.sup.2 /g or more and a peroxide curing agent are provided. Polymeric compositions which contain 25 parts by weight or more of the zinc dimethacrylate adjuvant per 100 parts by weight of rubbery polymer in the absence of reinforcing fillers exhibit excellent strength and hysteresis characteristcs when cured. The surface area of the zinc dimethacrylate adjuvant along with its method of preparation are extremely important factors in the excellent properties obtained when polymeric compositions containing the adjuvant are cured.
    Type: Grant
    Filed: April 17, 1986
    Date of Patent: December 15, 1987
    Assignee: The Firestone Tire & Rubber Company
    Inventors: Robert A. Hayes, Wendell R. Conard
  • Vulcanizable polymeric compositions containing zinc dimethacrylate and fillers
    Patent number: 4529770
    Abstract: Vulcanizable polymeric compositions containing natural rubber or copolymers of conjugated dienes and monoolefins, small amounts of a zinc dimethacrylate having a surface area of from about 3.7 to about 5.4 m.sup.2 /g or more, certain fillers or mixtures of fillers and peroxide curing agents are provided. The use of clay as a filler in combination with the zinc dimethacrylate in certain of the polymeric compositions is particularly advantageous as the combination synergistically enhances the strength of the vulcanized compositions.
    Type: Grant
    Filed: October 20, 1983
    Date of Patent: July 16, 1985
    Assignee: The Firestone Tire & Rubber Company
    Inventors: Robert A. Hayes, Wendell R. Conard
  • Method for preparing a zinc dimethacrylate powder having a specific surface area range
    Patent number: 4500466
    Abstract: Vulcanizable polymeric compositions comprising certain rubbery polymers or polymer blends, a zinc dimethacrylate adjuvant having a surface area of from about 3.7 to about 5.4 m.sup.2 /g or more and a peroxide curing agent are provided. Polymeric compositions which contain 25 parts by weight or more of the zinc dimethacrylate adjuvant per 100 parts by weight of rubbery polymer in the absence of reinforcing fillers exhibit excellent strength and hysteresis characteristics when cured. The surface area of the zinc dimethacrylate adjuvant along with its method of preparation are extremely important factors in the excellent properties obtained when polymeric compositions containing the adjuvant are cured.
    Type: Grant
    Filed: October 20, 1983
    Date of Patent: February 19, 1985
    Assignee: The Firestone Tire & Rubber Company
    Inventors: Robert A. Hayes, Wendell R. Conard
  • Unsaturated polyester-1,2 polybutadiene molding compound
    Patent number: 3980610
    Abstract: This invention relates to the use of a resinous polybutadiene or butadiene-styrene copolymer of high 1,2-configuration in polyesters of unsaturated acids which may contain styrene or the like, to raise the heat distortion temperature of the polyesters and increase their resistance to hydrocarbon solvents and sodium hydroxide solution.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: September 14, 1976
    Assignee: The Firestone Tire & Rubber Company
    Inventor: Wendell R. Conard