Patents by Inventor Herbert Hruschka

Herbert Hruschka 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).

  • Paper making retention system of bentonite and a cationic galactomannan
    Patent number: 6270626
    Abstract: The invention concerns a novel method for making paper based on sheet cellulose fibre, wherein a novel retention system comprising a suspension of bentonite and a cationic galactomannan is used to improve in particular the retention of the incorporated mineral fillers. The invention also concerns a method for making paper using a retention system which substantially improves draining.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: August 7, 2001
    Assignee: Rhodia Chimie
    Inventor: Herbert Hruschka