Patents by Inventor Shigechika Tomizawa

Shigechika Tomizawa 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 the systematic treatment of exhaust gases
    Patent number: 4919905
    Abstract: A process for the systematic treatment of exhaust gases which comprises the steps of injecting a neutralizing absorbent and an auxiliary agent into the exhaust gas and passing the exhaust gas through a filter which has been precoated with the auxiliary agent, as used above, whereby the neutralizing absorbent and the auxiliary agent are permitted to deposit as a layer on the precoated filter and are able to collect the acidic gas components and dust in the exhaust gas and blowing ammonia into the emitted purified exhaust gas so that nitrogen oxides in the exhaust gas are reduced, in the presence of a denitrating catalyst, into nitrogen gas.
    Type: Grant
    Filed: August 9, 1988
    Date of Patent: April 24, 1990
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Mitsuhiro Horaguchi, Shigechika Tomizawa, Yuji Kaihara