Patents by Inventor Heikki Pentti

Heikki Pentti 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).

  • Method of curing plastic raw materials impregnated in a porous stuff such as wood
    Patent number: 4049850
    Abstract: Wood is impregnated with a resin forming liquid, the impregnated wood is placed into a pressure vessel, and a medium of high heat capacity, such as steam, is introduced into the pressure vessel. The medium is heated above its boiling point to start curing the resin forming liquid, the heated medium cooling down at least to its phase transition temperaure as it delivers heat, and interrupting the introduction of the medium into the vessel whereby the medium is condensed on the surfaces of the impregnated wood and functions as a coolant.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: September 20, 1977
    Assignee: Kemi Oy
    Inventor: Heikki Pentti