Patents by Inventor Oskar Walter

Oskar Walter 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).

  • Polyester resin compositions which can be hardened with little shrinkage
    Patent number: 4806603
    Abstract: Polyester-based mouldings which have been hardened with little shrinkage, do not stick in the mould and therefore can be released from the mould without damage are accessible via moulding compositions containing an unsaturated polyester of defined acid number and certain end groups.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: February 21, 1989
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard Hess, Bert Brassat, Oskar Walter
  • Peroxide initiators
    Patent number: 4219674
    Abstract: Mixtures active as initiators for radical polymerization reactions comprising(1) from 1 to 99% by weight of a substituted diphenyl ethane; and(2) from 99 to 1% by weight of an organic peroxide,and a process for desensitizing organic peroxides.
    Type: Grant
    Filed: December 13, 1978
    Date of Patent: August 26, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinrich Wolfers, Oskar Walter, Hans Rudolph, Hans J. Rosenkranz
  • Free-flowing unsaturated polyester moulding compositions hardenable with very little shrinkage
    Patent number: 4079024
    Abstract: Unsaturated polyester moulding compositions hardenable with low shrinkage which are free-flowing comprise a crystalline unsaturated polyester, a copolymerizable vinyl monomer and a graft-polymerized butadiene polymer.
    Type: Grant
    Filed: July 1, 1976
    Date of Patent: March 14, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard Hess, Karl Raichle, Ludwig Bottenbruch, Karl-Heinz Ott, Hansjochen Schulz-Walz, Oskar Walter
  • Low shrink, free flowing polyester resin systems based on a mixture of a crystalline unsaturated polyester resin, a monomeric copolymerizable component and a cellulose ester
    Patent number: 3989655
    Abstract: A composition comprisingA. 24-70% by weight of an unsaturated crystalline polyester which is the condensation product of fumaric acid and a glycol of the formulaHO--CH.sub.2 --R--CH.sub.2 --OHwherein R is of the formula (CH.sub.2).sub.z wherein z is 1 to 18 or a symmetrical dialkyl derivative of (CH.sub.2).sub.z wherein the alkyl substituents are situated on the same carbon atom or cycloalkylene,B. 20-70% by weight of styrene andC. 1-30% by weight of at least one member selected from the group consisting of a polycarbonate, polyamide, polyvinyl alcohol, polyvinyl alcohol acetal, polyvinylchloride, cellulose ester of at least one organic acid and polyethylene. Said mixture may additionally contain one or more fibrous reinforcing agents and one or more fillers.
    Type: Grant
    Filed: January 17, 1974
    Date of Patent: November 2, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans Rudolph, August Bockmann, Leonhard Goerden, Oskar Walter, HansJochen Schulz-Walz