Patents by Inventor Gunter P. Langner

Gunter P. Langner 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).

  • Process for the production of 4- or 5-methyl-2-mercaptobenzimidazole
    Patent number: 4329477
    Abstract: A process for the production of 4- or 5-methyl-2-mercaptobenzimidazole, characterized in that 1 part of 4- or 5-methyl benzimidazolone is reacted with 3 to 10 parts by weight of carbon disulphide in the presence of 1% to 12% by weight of a basic catalyst, based on benzimidazolone, at a temperature in the range from 200.degree. C. to 300.degree. C. 4- or 5-methyl-2-mercaptobenzimidazole is used in the rubber industry as an anti-ager for both natural and synthetic rubber either on its own or in combination with other standard anti-agers.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: May 11, 1982
    Assignee: Bayer AG
    Inventors: Rudiger Schubart, Gunter P. Langner