Patents by Inventor Jukka Niskanen

Jukka Niskanen 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).

  • Procedure for filtering lime sludge meant to be regenerated to lime
    Patent number: 4687583
    Abstract: In a procedure for filtering lime sludge meant to be regenerated to lime. Lime sludge is produced in the causticizing process in a sulphate cellulose mill, where it can be reused after regeneration to lime. In the procedure, lime sludge suspension is filtered on a filter drum in continuous rotation by depositing lime sludge on the drum and detaching part of the superficial layer of the lime sludge on the drum with a scraper so that the deeper lime sludge layer on the drum, which by-passes the scraper, serves as filtering medium for the superficial layer that is detached (as a so-called pre-coat).
    Type: Grant
    Filed: March 12, 1986
    Date of Patent: August 18, 1987
    Assignee: Enso-Gutzeit Oy
    Inventors: Matti Lankinen, Holger Engdahl, Raimo Kohonen, Jukka Niskanen, Markku Kosonen