Patents by Inventor William C. Forester

William C. Forester 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 polyamine mixtures of the polyamino-polyaryl-polymethylene series
    Patent number: 5310769
    Abstract: A process for production of polyamines of the diphenylmethane series through a condensation reaction of aniline with formaldehyde in the presence of an acid catalyst, neutralization of the acid catalyst after reaction completion, and distillation of the resultant polyamine mixture is described. The key feature of the process is the abrupt increase in reaction temperature after the condensation reaction or after the first rearrangement step.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: May 10, 1994
    Assignees: Bayer Aktiengesellschaft, Miles Inc.
    Inventors: Christian Konig, Manfred Gallus, Reinhold Wullner, Franz-Moritz Richter, Rudolf Uchdorf, William C. Forester