Patents by Inventor Gertrud A. Klein

Gertrud A. Klein 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).

  • Patent number: 6582824
    Abstract: A composition comprises a curable epoxy-containing material, a first thermoplastic polyurethane component, a curative for the epoxy-containing material, and optionally, a second thermoplastic polyurethane component that is different than the first thermoplastic polyurethane component. The compositions are useful for sealing discontinuities in a substrate surface, especially those found in motor vehicles. Sealant articles and methods of sealing discontinuities are also disclosed.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: June 24, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Stefan Weigl, Gertrud A. Klein, Shuichi Kitano, Kotaro Shinozaki, Tomohiro Koiwa, Kazuyoshi Shiozaki
  • Publication number: 20010025079
    Abstract: The present invention provides an adhesive composition comprising a uniform mixture of components, the components comprising a first and a second thermoplastic polyurethane, the first thermoplastic polyurethane being a thermoplastic polyurethane of which the shear tan &dgr; versus temperature curve approaches infinity at a temperature above 150° C. and that has a glass transition temperature of not more than 10° C., the second thermoplastic polyurethane having a softening point of not more than 80° C. and the adhesive composition being solid at a temperature of 20° C. and being capable of bonding to glass or a ceramic frit layer provided on glass at a temperature between 100° C. and 160° C. The present invention further provides a method for bonding a locator pin to a window glass using the adhesive composition and further a locator pin having the adhesive composition.
    Type: Application
    Filed: December 27, 2000
    Publication date: September 27, 2001
    Applicant: 3M Innovative Properties Company
    Inventors: Stefan Weigl, Gertrud Klein
  • Patent number: 4919680
    Abstract: Crome tanning of pickled animal hides with a tanning agent comprising a reaction product of a basic chromium (III) sulfate and aliphatic C.sub.4 -C.sub.6 dicarboxylic acids or their salts is improved by preparing the reaction product in an aqueous solution from basic chromium (III) sulfate and 0.2 to 0.8 mol of the aliphatic dicarboxylic acids per mol chromium oxide of the basic chromium sulfate with subsequent adjustment of the theoretical basicity to 0 to 50% with alkali metal hydroxide or carbonate, the reaction product being added to a hide pickling liquor in the form of an aqueous solution having a chromium oxide content of at least 5% or in powder form in a quantity of 0.9 to 1.5% chromium oxide, based on hide weight, with a liquor volume less than 100%, based on hide weight, the final pH value being above 4.0 and the final temperature above 40.degree. C.
    Type: Grant
    Filed: August 11, 1988
    Date of Patent: April 24, 1990
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernhard Wehling, Bernd Makowka, Heinz-Gunter Klein, deceased, Gertrud Klein, heir, Helga Rosentreter