Patents by Inventor Takekazu Maeda

Takekazu Maeda 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).

  • FILTER MATERIAL FOR REMOVING LEUKOCYTES, LEUKOCYTE REMOVAL FILTER AND METHOD FOR PRODUCING SAME
    Publication number: 20210268415
    Abstract: A filter material for removing leukocytes including a nonwoven fabric composed of polyester fibers, the nonwoven fabric having a first endothermic peak at a melting point and a second endothermic peak having a maximum in a temperature range from 155° C. to 225° C. in a DSC curve obtained by differential scanning calorimetry (DSC).
    Type: Application
    Filed: July 9, 2019
    Publication date: September 2, 2021
    Applicant: KANEKA CORPORATION
    Inventors: Kazuya NAGAMINE, Takayuki MIYAMOTO, Takekazu MAEDA
  • Polymerization apparatus and batch-wise process for producing vinyl chloride resin
    Patent number: 5278262
    Abstract: In a process for the microsuspension of emulsion polymerization of vinyl chloride using a polymerization apparatus equipped with an agitator the improvement where the ratio (H/D) of the effective height (H) of the apparatus to the effective inner diameter (D) of the apparatus is 4 or more.
    Type: Grant
    Filed: May 19, 1992
    Date of Patent: January 11, 1994
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Kazuo Dairaku, Takekazu Maeda, Nobuki Toba, Hideyuki Kametani, Keizo Hayashi, Mitsumasa Hasegawa, Masahiro Tsujinaka
  • Polymerization apparatus having an effective height/effective inner diameter ratio of at least 4 and a circumferential agitative diameter/effective inner ratio diameter of from 0.7 to 0.9
    Patent number: 5169918
    Abstract: In a process for the microsuspension or emulsion polymerization of vinyl chloride using a polymerization apparatus equipped with an agitator the improvement where the ratio (H/D) of the effective height (H) of the apparatus to the effective inner diameter (D) of the apparatus is 4 or more.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: December 8, 1992
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshio Tomishima, Kazuo Dairaku, Takekazu Maeda, Nobuki Toba, Hideyuki Kametani, Keizo Hayashi, Mitsumasa Hasegawa, Masahiro Tsujinaka