Patents by Inventor Hayha Aarno

Hayha Aarno 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 for producing silicon halides by reducing silicon tetrhalides under a plasma torch
    Patent number: 5077027
    Abstract: Silicon difluoride is produced by the reduction of silicon tetrafluoride in a plasma torch under argon atmosphere. Instead of the usual reducing agents finely divided silicon has now been used as a reducing agent.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: December 31, 1991
    Assignee: Kemira Oy
    Inventors: Judin Vesa-Pekka, Hayha Aarno, Koukkari Pertti