Patents by Inventor Patrik P. H. Lownertz

Patrik P. H. Lownertz 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).

  • Kraft pulping process wherein sulphide-rich and sulphide-lean white liquors are generated
    Patent number: 5507912
    Abstract: There is disclosed a process of increasing efficiency in a kraft pulping process that utilizes initial, bulk, and final delignification steps, a recovery boiler, and a caustic treatment step, which allows production of a white liquor stream that is separated into a sulphide-lean and sulphide-rich streams.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: April 16, 1996
    Assignee: H. A. Simons Ltd.
    Inventor: Patrik P. H. Lownertz