Patents by Inventor Wilhelmus J. M. Weeres

Wilhelmus J. M. Weeres 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 separation of a phenol
    Patent number: 4987273
    Abstract: The invention relates to a process for the separation of a phenol from a mixture obtained by the carboxylation of the phenol and containing phenol, phenolate and the carboxylation products thereof, which process comprises separation carried out by selectively absorbing the phenol into the wall of a membrane, solubilizing the phenol in the membrane matrix, diffusing the phenol through the membrane and desorbing the phenol from the other wall.
    Type: Grant
    Filed: November 21, 1989
    Date of Patent: January 22, 1991
    Assignee: Shell Oil Company
    Inventors: Johan G. A. Bitter, Johannes L. W. C. den Boestert, Wilhelmus J. M. Weeres