Patents by Inventor Sueo Takashima

Sueo Takashima 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).

  • Desiccant for HFC-32 and HFC-152A
    Patent number: 5514633
    Abstract: A method for the production of a desiccant for HFC-32, HFC-152a and blended refrigerants containing HFC-32 and/or HFC-152a comprises immersing formed articles of 3A type zeolite having 20 to 60% in ion equivalent weight of its sodium ions exchanged for potassium ions in an aqueous solution of at least one member selected from the group consisting of sodium silicate and potassium silicate, thereby effecting deposition of SiO.sub.2 on the formed articles, removing the SiO.sub.2 -deposited formed articles from the aqueous solution, dehydrating the wet formed articles and subsequently activating the dehydrated formed articles. Also provided is a desiccant for HFC-32, HFC-152a and blended refrigerants containing HFC-32 and/or HFC-152a produced by this method.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: May 7, 1996
    Assignee: Union Showa K.K.
    Inventors: Yoshitaka Noguchi, Shigeru Adachi, Masayuki Abe, Sueo Takashima, Masayuki Hashimoto