Patents by Inventor Wolf Brenner

Wolf Brenner 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: 4157352
    Abstract: A process for the manufacture of 2,2,4-trimethyl-cyclopent-4-ene-1,3-dione by oxidizing 3,5,5-trimethyl-cyclohex-2-ene-1,4-dione with oxygen or an oxygen-containing gas in the present of a manganese, cobalt or copper containing catalyst.
    Type: Grant
    Filed: July 19, 1978
    Date of Patent: June 5, 1979
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Wolf Brenner
  • Patent number: 4055634
    Abstract: Compounds represented by the formula(R.sub.1).sub.m Al(OR.sub.2).sub.n Iwherein m and n each are 1 or 2 and the sum of m and n is 3; R.sub.1 is alkyl; R.sub.2 is substituted and unsubstituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, aryl, alkanoyl, alkenoyl or aroyl; wherein the substituents on R.sub.2 when R.sub.2 is alkyl, alkenyl, alkanoyl and alkenoyl are one or more of cycloalkyl, cycloalkenyl, alkyl substituted cycloalkenyl, or aryl, alkoxy, cycloalkoxy, cycloalkenyloxy, aryloxy or alkyl and/or alkoxy substituted aryl, alkoxy, cycloalkoxy, cycloalkenyloxy or aryloxy; and wherein the substituents on R.sub.2 when R.sub.2 is cycloalkyl, cycloalkenyl, aryl and aroyl are one or more of alkyl, alkoxy or aryl; and when R.sub.2 is phenyl two adjacent alkyl and/or alkoxy substituents on the phenyl can be joined to form a 5 or 6-membered saturated ring; when m is 2 and n is 1, R.sub.2 can be--(R.sub.3 O).sub.p --Al(R.sub.1).sub.2 (a)wherein R.sub.1 has the significance above and each R.sub.
    Type: Grant
    Filed: February 11, 1975
    Date of Patent: October 25, 1977
    Assignee: Hoffmann-La Roche, Inc.
    Inventors: Wolf Brenner, Gustav Erlemann, Horst Pauling
  • Patent number: 4046813
    Abstract: Process for producing ketoisophorone from .beta.-isophorone by oxidation utilizing a metal salt catalyst and an organic nitrogen base.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: September 6, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventor: Wolf Brenner
  • Patent number: 3937740
    Abstract: A process for producing 2,3,6-trimethylphenol by reacting a m-cresol with methanol in the gas phase in the presence of a catalyst containing ceric oxide, zinc oxide, and an oxide of a metal selected from the group consisting of an alkali metal, barium, calcium or strontium.
    Type: Grant
    Filed: March 28, 1974
    Date of Patent: February 10, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Wolf Brenner, Herbert Lindlar, Rudolf Hinderling