Patents by Inventor Paul R. Wambach, deceased

Paul R. Wambach, deceased 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 preparation of 2-chloro-4-nitrotoluene
    Patent number: 4456777
    Abstract: A process for the preparation of 2-chlor-4-nitrotoluene is disclosed by chlorination of 4-nitrotoluene in the presence of iodine. The resultant 2-chloro-4-nitrotoluene is a valuable intermediate for the preparation of herbicides.
    Type: Grant
    Filed: June 28, 1982
    Date of Patent: June 26, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerd-Michael Petruck, Paul R. Wambach, deceased, Adolf Wissner
  • Process for purifying the methanol employed in the preparation of formaldehyde
    Patent number: 4453020
    Abstract: The invention relates to a process for purifying, by treatment with an acid ion exchanger and, if desired, a basic ion exchanger, the methanol employed in the preparation of formaldehyde.
    Type: Grant
    Filed: August 25, 1982
    Date of Patent: June 5, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kurt Klinkmann, Paul R. Wambach, deceased
  • Process for the preparation of 1,3,5-trichlorobenzene
    Patent number: 4409407
    Abstract: 1,3,5-Trichlorobenzene is prepared by the isomerization of other trichlorobenzenes at an elevated temperature after the addition of aluminum trichloride and formic acid.
    Type: Grant
    Filed: August 16, 1982
    Date of Patent: October 11, 1983
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerd-Michael Petruck, Paul R. Wambach, deceased