Patents by Inventor Mia Piirainen

Mia Piirainen 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).

  • Publication number: 20110036523
    Abstract: A method for manufacturing mechanical pulp. Raw material of the mechanical pulp is introduced. The raw material is refined in a first refining stage to form the mechanical pulp. The pH of the mechanical pulp is adjusted to between 9 and 11 in a process step in which a first process delay is arranged. The first process delay is at least 0.5 hours. The mechanical pulp is sorted into a first accepted stock and a first rejected stock. The first rejected stock is ozonated. The pH of the first rejected stock is at the start of the ozonation process is between 9 and 11. The ozonated first rejected stock is refined in a second refining stage so that at least a part of the ozonated first rejected stock will belong to a second accepted stock. The first accepted stock and the second accepted stock are combined. The mechanical pulp may be used.
    Type: Application
    Filed: December 27, 2007
    Publication date: February 17, 2011
    Applicant: UPM-Kymmene Corporation
    Inventors: Esko Härkönen, Taisto Tienvieri, Jouko H. Lehto, Markku Gummerus, Folke Örså, Liisa Pirinen, Mia Piirainen, Jean-Cristophe Hostachy, Serge Kocimski, Ernst-Martin Billing