Patents by Inventor Markku S. Korpela

Markku S. Korpela 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).

  • Process for wetting a paper web during calendering using coating with water-containing microcapsules
    Patent number: 5076888
    Abstract: The invention relates to a process for wetting a paper web in a calendering step by using water-containing microcapsules in the surface structure layer of the paper web, said microcapsules being ruptured in the calendering step whereby water is released. The invention also relates to microcapsules comprising a water-impermeable shell and an interior substantially comprising water, and having a diameter of 0.1 to 100 .mu.m and a shell thickness of 0.01 to 5 .mu.m.
    Type: Grant
    Filed: October 17, 1990
    Date of Patent: December 31, 1991
    Assignee: Kaukas Oy
    Inventor: Markku S. Korpela