Patents by Inventor Erwin H. Kobel, deceased

Erwin H. Kobel, 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).

  • Method for purifying pentachlorophenol
    Patent number: 4142943
    Abstract: The decomposition of pentachlorophenol during distillation to remove impurities is markedly reduced by incorporating into the distilling molten pentachlorophenol a hydroxyl or polyhydroxyl containing organic compound having a boiling point above about 100.degree. C. in the presence or absence of water.
    Type: Grant
    Filed: September 23, 1974
    Date of Patent: March 6, 1979
    Assignee: The Dow Chemical Company
    Inventors: Erwin H. Kobel, deceased, Masao Yoshimine