Patents by Inventor Yukio Mizutani

Yukio Mizutani 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).

  • Patent number: 6245270
    Abstract: A polyolefin porous material is produced by synthesizing silica particles, polysiloxane particles or crosslinked vinyl polymer particles having an average particle diameter of 0.01 to 0.1 &mgr;m in a molten polyolefin to obtain a polyolefin composition. The polyolefin composition is subsequently subjected to molding and stretching to obtain a polyolefin porous material. The obtained polyolefin porous material contains fine particles dispersed therein, substantially without forming agglomerates, and has an average pore diameter of 0.005 to 0.1 &mgr;m. The small pore diameter allows the material to be used as a liquid/liquid separation membrane, a base material for precision filtration, or a separator for batteries.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: June 12, 2001
    Assignee: Tokuyama Corporation
    Inventors: Yukio Mizutani, Satoshi Nagou
  • Patent number: 5997292
    Abstract: According to the present invention, gas which contains no impurities and has a high temperature of approximately 700 to C. can be supplied for a long period with a short preparation time, and fluctuation in the temperature during supply can be reduced.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: December 7, 1999
    Assignee: Nippon Furnace Kogyo Kabushiki Kaisha
    Inventors: Ryoichi Tanaka, Toshiaki Hasegawa, Jun Sudo, Tsutomu Yasuda, Yukio Mizutani, Masashi Katsuki, Hiroshige Ikebe, deceased
  • Patent number: 4267084
    Abstract: The present invention provides a vinyl chloride polymer composition comprising an intimate mixture of a first vinyl chloride polymer containing a sulfide linkage in the molecular chain and a second vinyl chloride polymer having a higher molecular weight than the first polymer, and a process for producing a first vinyl chloride polymer for use in the composition, comprising polymerizing vinyl chloride or a mixture of vinyl chloride and an ethylenically unsaturated monomer in the presence of a free radical initiator using as a chain transfer agent a mercapto compound or a disulfide compound. Said vinyl chloride polymer composition has been improved in heat stability and processability.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: May 12, 1981
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Yukio Mizutani, Katsuo Mitani, Takashi Maehara
  • Patent number: 4226636
    Abstract: A process for producing calcium silicate of the rational formula 2CaO.3SiO.sub.2.nSiO.sub.2.mH.sub.2 O wherein m is a number of more than 0, and n is a number of 0.1 to 10 from a silicate compound and a calcium compound, which comprises contacting a water-soluble silicate compound with a calcium compound in an aqueous medium, and heating them to a temperature of to C., the amount of the aqueous medium being 5 to 100 times the weight of the calcium silicate obtained, and a process for producing calcium silicate or a calcium silicate-gypsum composite, which comprises adding a water-soluble silicate or its aqueous solution gradually to an aqueous suspension of gypsum, and heating the mixture to a temperature of to C. The calcium silicate and the calcium silicate-gypsum composite, which have a structure composed of an assembly of petal-like flakes, are useful as an adsorbent carrier, a delusterant or a filtration aid.
    Type: Grant
    Filed: December 29, 1978
    Date of Patent: October 7, 1980
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Yukio Mizutani, Yoshiaki Watanabe, Genji Taga
  • Patent number: 3953565
    Abstract: A process for producing flame-retardant shaped articles of thermoplastic synthetic resins is disclosed which process comprises dispersing homogeneously in a thermoplastic synthetic resin an inorganic metal compound and a surfactant, said inorganic metal compound being one capable of forming a hydrate by reacting with a member of the group consisting of water and an aqueous acid solution, forming the resulting composition into a desired shaped article, and thereafter contacting the thus obtained shaped article with a member selected from the group consisting of water and an aqueous acid solution, thereby converting said inorganic metal compound contained in said shaped article to a hydrate.
    Type: Grant
    Filed: October 18, 1974
    Date of Patent: April 27, 1976
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Yukio Mizutani, Kazuo Shikata, Shunichi Nakamura, Michio Yoshimizu
  • Patent number: 3946079
    Abstract: A process of producing ketone condensation products which comprises condensing at a temperature of from to a ketone having 3-19 carbon atoms in the presence of, as a catalyst, at least one metal phosphate selected from titanium phosphate, zirconium phosphate, hafnium phosphate, and tin phosphate; dimeric condensation or trimeric condensation can be achieved depending upon the reaction conditions.
    Type: Grant
    Filed: January 7, 1971
    Date of Patent: March 23, 1976
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Yukio Mizutani, Yusuke Izumi, Yoshiaki Watanabe