Patents by Inventor Henry W. Hoftiezer

Henry W. Hoftiezer 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).

  • Cationic reaction product of kraft lignin with aldehyde and polyamine
    Patent number: 4455257
    Abstract: Cationic reaction products having improved flocculating performance for suspended solids are obtained by the reaction of kraft lignin with aldehydes and polyamines.
    Type: Grant
    Filed: October 12, 1982
    Date of Patent: June 19, 1984
    Assignee: Reed Lignin, Inc.
    Inventors: Henry W. Hoftiezer, Daniel J. Watts, Akio Takahashi