Patents by Inventor Arnold S. Adler

Arnold S. Adler 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 2-aryl-2H-benzotriazoles
    Patent number: 4141903
    Abstract: A process for the production of 2-aryl-2H-benzotriazoles comprises reducing and cyclizing the corresponding o-nitroazobenzenes with carbon monoxide at a temperature in the range of about 20.degree. C. to about 150.degree. C. and at a pressure in the range of about 15 psia (1 atmosphere) to about 1000 psia (66 atmospheres) in an alkaline medium at a pH over 10 in the presence of a copper-amine complex catalyst. High yields of pure product are obtained with a concomitant reduction of undesired by-products and a reduction in effluent pollution problems.
    Type: Grant
    Filed: August 17, 1977
    Date of Patent: February 27, 1979
    Assignee: Ciba-Geigy Corporation
    Inventor: Arnold S. Adler