Patents by Inventor Kees Delcour

Kees Delcour 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).

  • Nitrogen-containing water-soluble polymer flocculants
    Patent number: 4647379
    Abstract: A nitrogen-containing prepolymer is prepared by adding an epihalohydrin, particularly epichlorohydrin, to piperazine in an amount of more than one mole of epihalohydrin per mole of piperazine, in the substantial absence of strong base.The prepolymer is reacted with polyalkylene polyamines in the absence of strong base to produce a polymeric flocculant.
    Type: Grant
    Filed: November 13, 1985
    Date of Patent: March 3, 1987
    Assignee: The Dow Chemical Company
    Inventor: Kees Delcour