Patents by Inventor Hayha

Hayha 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 producing ceramic raw materials
    Patent number: 5178847
    Abstract: The invention relates to a process for the production of silicon ceramic whiskers and silicon ceramic powder from silicon fluoride and ammonia or a hydrocarbon, at an elevated temperature. According to the invention, the hydrocarbon or ammonia (4) is decomposed separately at a high temperature into reactive carbon or nitrogen and hydrogen, whereafter the carbon or nitrogen radical thus obtained is further in a gas phase contacted with reactive silicon formed therein from silicon difluoride, in order to deposit finely-divided silicon nitride or silicon carbide out from the gas phase.
    Type: Grant
    Filed: November 28, 1989
    Date of Patent: January 12, 1993
    Assignee: Kemira OY
    Inventors: Vesa-Pekka Judin, Hayha, Pertti Koukkari