Patents by Inventor Lajos Avar

Lajos Avar 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).

  • 1,3-Dihydrocarbyl-pyrazole compounds as stabilizers for organic materials
    Patent number: 3963737
    Abstract: 1,3-Dihydrocarbyl-pyrazole compounds, having a 5-hydroxyl group in free or nickel salt form, characterized by a ketoxyimino group bound directly to the 4-position of the pyrazole ring through the ketoxyimino functional carbon atom, which are useful as stabilizers of organic materials against the adverse effects of ultraviolet light.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: June 15, 1976
    Assignee: Sandoz Ltd.
    Inventors: Lajos Avar, Kurt Hofer
  • Organic compounds
    Patent number: 3959265
    Abstract: The present invention concerns novel nickel complexes (I) possessing U.V. stabilizing properties characterized by bearing per molecule 2 monodentate nickel coordinated 1,3-hydrocarbyl-4-(greater than C.sub.1)-acyl-pyrazole-5-oxy ligands and one bidentate or two monodentate nickel coordinated primary or secondary amine ligands, and their use as U.V. stabilizers for e.g. plastics materials.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: May 25, 1976
    Assignee: Sandoz Ltd.
    Inventors: Lajos Avar, Kurt Hofer
  • Organic compounds
    Patent number: 3936479
    Abstract: The present invention concerns benzophenone compounds of the formula: ##SPC1##WhereinR.sub.1, r.sub.2, r.sub.3 and R.sub.4 are hydrogen or substituents, e.g. alkyl,X is a mono-, di- or trivalent radical andn is an integer 1, 2 or 3.The compounds are useful as U.V. stabilizers for, for example, plastics materials.
    Type: Grant
    Filed: May 4, 1973
    Date of Patent: February 3, 1976
    Assignee: Sandoz Ltd., (Sandoz AG)
    Inventors: Lajos Avar, Kurt Hofer, Martin Preiswerk
  • Novel benzothiophene derivatives as stabilizers for organic compounds
    Patent number: 3935231
    Abstract: The present invention concerns benzothiophene acyl (2) derivatives of the formula, ##SPC1##Wherein R.sub.1, R.sub.2 and R are substituents and n is an integer 1 or 2.The compounds are useful as u.v. stabilizers for, e.g. plastic materials.
    Type: Grant
    Filed: October 11, 1973
    Date of Patent: January 27, 1976
    Assignee: Sandoz Ltd., (Sandoz AG)
    Inventors: Lajos Avar, Kurt Hofer