Patents by Inventor Lawrence D. Fiedler

Lawrence D. Fiedler 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 to reduce compression set in silanol-containing silicone elastomer bases
    Patent number: 5081172
    Abstract: A method of reducing the compression set of a silicone elastomer is accomplished by mixing an alkenyl silazane with a previously prepared, based heated, silanol-containing silicone elastomer base. Fluorosilicone elastomers prepared by these methods find use in gasketing and sealing application which are exposed to fuels and solvents.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: January 14, 1992
    Assignee: Dow Corning Corporation
    Inventors: Roger G. Chaffee, Lawrence D. Fiedler, Myron T. Maxson
  • Silacyclobutane functional polymers and their production
    Patent number: 5049611
    Abstract: The silacyclobutane functional polydiorganosiloxane copolymers of the invention have the following structure: ##STR1## wherein M is selected from ##STR2## wherein R.sup.a, R.sup.b, R.sup.c, R.sup.d, R.sup.e, and R.sup.f are independently monovalent radicals selected from the group consisting of hydrogen, hydrocarbon, or substituted hydrocarbon; m and x are integers of from 0 or more; n is equal to 1; and p is an integer greater than 0; with the proviso that there is at least one silacyclobutane group in the copolymer. The copolymer can be made by reacting a hydroxyl endblocked polydiorganosiloxane with either a difunctional chain extending silacyclobutane or with a monofunctional chain stopper, or a mixture of chain extender and chain stopper. The copolymer can be made into curable compositions by use of suitable catalyst.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: September 17, 1991
    Assignee: Dow Corning Corporation
    Inventors: Ronald H. Baney, Carl J. Bilgrien, Gary T. Burns, Lawrence D. Fiedler, Chi-long Lee
  • Silacyclobutanes
    Patent number: 4985565
    Abstract: Novel silacyclobutanes useful as silylating agents and a process for their preparation are provided. The process comprises reacting a halogen substituted silacyclobutane with a silylating reagent to exchange the halogen substituents with groups on the silylating reagent.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: January 15, 1991
    Assignee: Dow Corning Corporation
    Inventors: Ronald H. Baney, Carl J. Bilgrien, Lawrence D. Fiedler, Chi-long Lee
  • Process for preparation of silacyclobutanes
    Patent number: 4965367
    Abstract: Novel silacyclobutanes useful as silylating agents and a process for their preparation are provided. The process comprises reacting a halogen substituted silacyclobutane with a silylating reagent to exchange the halogen substituents with groups on the silylating reagent.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: October 23, 1990
    Assignee: Dow Corning Corporation
    Inventors: Ronald H. Baney, Carl J. Bilgrien, Lawrence D. Fiedler, Chi-long Lee
  • Thermally stable fluorinated organosiloxane gel composition
    Patent number: 4898903
    Abstract: Polyorganosiloxane gels exhibiting a resistance to discoloration, hardening and surface deformation at temperatures of 100.degree. C. and above can be prepared by curing compositions comprising a polydiorganosiloxane containing silicon bonded fluorinated hydrocarbon radicals and an organohydrogensiloxane containing at least three silicon bonded hydrogen atoms per molecule in the presence of a platinum containing catalyst and up to 0.1 percent, based on the weight of said composition, of copper acetylacetonate.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: February 6, 1990
    Assignee: Dow Corning Corporation
    Inventors: Diane M. Rasch, Lawrence D. Fiedler