Patents by Inventor Josef Wiedemann

Josef Wiedemann 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).

  • Publication number: 20180305541
    Abstract: The present application relates to novel polyester-ether compositions and their use as oxygen scavenging materials in polyester resins.
    Type: Application
    Filed: June 4, 2018
    Publication date: October 25, 2018
    Applicant: INVISTA NORTH AMERICA S.A.R.L.
    Inventors: Eva-Marie LEUSCHNER, Josef WIEDEMANN, Uwe BAYER, Stephan KRETSCHMER, Karsten FRITSCH
  • Patent number: 10017639
    Abstract: The present application relates to novel polyester-ether compositions and their use as oxygen scavenging materials in polyester resins.
    Type: Grant
    Filed: December 19, 2014
    Date of Patent: July 10, 2018
    Assignee: INVISTA NORTH AMERICA S.A.R.L.
    Inventors: Eva-Marie Leuschner, Josef Wiedemann, Uwe Bayer, Stephan Kretschmer, Karsten Fritsch
  • Publication number: 20160333179
    Abstract: The present application relates to novel polyester-ether compositions and their use as oxygen scavenging materials in polyester resins.
    Type: Application
    Filed: December 19, 2014
    Publication date: November 17, 2016
    Applicant: INVISTA NORTH AMERICA S.A R.L.
    Inventors: Eva-Marie LEUSCHNER, Josef WIEDEMANN, Uwe BAYER, Stephan KRETSCHMER, Karsten FRITSCH
  • Patent number: 5972248
    Abstract: The present invention relates to novel stabilizers of the formula (I) ##STR1## in which the substituents have the meaning defined in the description. These novel stabilizers are particularly suitable for stabilizing organic material, such as plastics, oils, paints and coatings, against degradation by light, radiation, heat and oxygen.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: October 26, 1999
    Assignee: Clariant GmbH
    Inventors: Thomas Stahrfeldt, Josef Wiedemann, Matthias Zah
  • Patent number: 5633378
    Abstract: Polyalkylpiperidine compounds of the formula I ##STR1## in which Y is the group ##STR2## are very effective stabilizers for organic materials.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: May 27, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Karl Gaa, Matthias Z ah, Josef Wiedemann
  • Patent number: 5107043
    Abstract: By dividing the known condensation of acetoacetic acid diol esters with phenols into two process steps, a reduction in the cost of the entire process can be achieved.Methyl acetoacetate is first condensed with a phenol and the methyl 3,3-bis(4-hydroxyalkylphenyl)butanoate formed is reacted with the desired diol in the presence of a transesterification catalyst. In this way only one acetoacetic ester is necessary for various final products. The final products are useful stabilizers for plastics, in particular polyolefins.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: April 21, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Georg Schmailzl, Josef Wiedemann, Gerhard Pfahler, Gunther Nowy