Patents by Inventor W. E. Zarnecki

W. E. Zarnecki 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).

  • Linear dimethylamine-epichlorohydrin copolymer
    Patent number: 3975347
    Abstract: A process for preparing high molecular weight substantially linear condensaton polymers of lower aliphatic secondary amines and difunctional epoxide compounds in concentrations of from 60-85% by weight in aqueous solution is disclosed.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: August 17, 1976
    Assignee: Nalco Chemical Company
    Inventors: K. G. Phillips, W. E. Zarnecki