Patents by Inventor Martti Lehtimaki

Martti Lehtimaki 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 causing the gaseous sulfur compounds of flue gases to react to form solid compounds which can be separated from the flue gases
    Patent number: 4788047
    Abstract: The invention relates to a process and apparatus for causing the sulfur dioxide of flue gases to react to form solid sulfates and sulfites which can be separated from the flue gases. Sulfur dioxide containing flue gases (16) are directed according to the invention into one end of an oblong reaction zone (4), in addition to which pulverous calcium compounds and water are directed separately into the reaction zone at several points, and finally from the opposite end a flue gas suspension is withdrawn and directed to dust separation (5). By feeding the pulverous reagent and the water separately into the reactor 4, the problems involved in the preparing, handling and spraying of an aqueous slurry are avoided, in addition to which the retention time and the reaction conditions can be regulated easily in the oblong reactor 4.
    Type: Grant
    Filed: November 5, 1985
    Date of Patent: November 29, 1988
    Assignee: Oy Tampella AB
    Inventors: Sirpa Hamala, Timo Kenakkala, Pentti Janka, Tuomo Ruohola, Martti Lehtimaki
  • Mail box
    Patent number: D546025
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: July 3, 2007
    Assignee: BobiCompany Oy
    Inventors: Martti Lehtimäki, Lasse Lehtimäki
  • Pen
    Patent number: D352957
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: November 29, 1994
    Assignee: Oy Lehtimaki & Partanen Marketing Ltd.
    Inventor: Martti Lehtimaki