Patents by Inventor Enn Paart

Enn Paart 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).

  • Inhibition of hydrogen peroxide decomposing enzymes during bleaching of cellulose fibers
    Patent number: 5885412
    Abstract: A method and composition for suppressing or inhibiting the decomposing action of enzymes on hydrogen peroxide, e.g. peroxidase and catalase, during bleaching of cellulose fibres with hydrogen peroxide, especially in connection with the production of recycled paper, in such a way that microorganisms are not markedly affected, and discharges that are dangerous to the environment are minimized. The composition contains hydroxylamine, thiocyanate salts, formic acid, ascorbic acid or nitrites.
    Type: Grant
    Filed: August 8, 1995
    Date of Patent: March 23, 1999
    Assignee: Bim Kemi AB
    Inventors: Enn Paart, Kjell Abrahamsson, Peter W.ang.llberg
  • Collector intended to be used in deinking of waste paper according to the flotation process
    Patent number: 5736622
    Abstract: A collector that is intended to be used at deinking of waste paper according to the flotation process. The collector includes a polyester obtained through reaction between polyalkylene glycol, di and/or tricarboxylic acid and/or anhydrides thereof as well as a saturated fatty acid with 12-18 carbon atoms. The polyester shows a molecular weight between 3000-10000.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: April 7, 1998
    Assignee: Bim Kemi AB
    Inventors: Peter W.ang.llberg, Enn Paart