Patents by Inventor Tadashi Ema

Tadashi Ema 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).

  • Metalloporphyrin complex, manufacturing process therefor and carbon dioxide fixation catalyst therefrom, as well as process for manufacturing cyclic carbonate
    Patent number: 9211534
    Abstract: There is provided a metalloporphyrin complex represented by general formula (1): wherein M is a metal; A1 to A4 are independently of each other a substituent represented by general formula (2): -D-E+X???(2) wherein D is a divalent organic group having 1 to 20 carbon atoms; E+ is a quaternary ammonium group or quaternary phosphonium group having 3 to 60 carbon atoms; and X is a halogen atom. There is thus provided a metalloporphyrin complex which, when used as a carbon dioxide fixation catalyst, exhibits high catalytic activity, has a small environmental burden and can be easily synthesized.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: December 15, 2015
    Assignee: NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY
    Inventors: Tadashi Ema, Takashi Sakai, Yuki Miyazaki
  • Organic-inorganic composite material and process for producing same
    Patent number: 8841105
    Abstract: Disclosed is an organic-inorganic composite material obtained by chemically modifying a microorganism-derived ceramic material with an organic group, and a process for producing the organic-inorganic composite material. The process is characterized by reacting a microorganism-derived ceramic material with at least one compound selected from the group consisting of silane coupling agents represented by formula (1), silane coupling agents represented by formula (2), and titanate coupling agents represented by formula (3). The organic-inorganic complex can be used in applications for immobilized catalysts and immobilized enzyme catalysts.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: September 23, 2014
    Assignee: National University Corporation Okayama University
    Inventors: Takashi Sakai, Tadashi Ema, Jun Takada, Tatsuo Fujii, Makoto Nakanishi, Hideki Hashimoto
  • METALLOPORPHYRIN COMPLEX, MANUFACTURING PROCESS THEREFOR AND CARBON DIOXIDE FIXATION CATALYST THEREFROM, AS WELL AS PROCESS FOR MANUFACTURING CYCLIC CARBONATE
    Publication number: 20140228561
    Abstract: There is provided a metalloporphyrin complex represented by general formula (1): wherein M is a metal; A1 to A4 are independently of each other a substituent represented by general formula (2): -D-E+X???(2) wherein D is a divalent organic group having 1 to 20 carbon atoms; E+ is a quaternary ammonium group or quaternary phosphonium group having 3 to 60 carbon atoms; and X is a halogen atom. There is thus provided a metalloporphyrin complex which, when used as a carbon dioxide fixation catalyst, exhibits high catalytic activity, has a small environmental burden and can be easily synthesized.
    Type: Application
    Filed: September 19, 2012
    Publication date: August 14, 2014
    Applicant: National University Corporation Okayama University
    Inventors: Tadashi Ema, Takashi Sakai, Yuki Miyazaki
  • Optical-isomer separating agent for chromatography and process for producing the same
    Patent number: 8362237
    Abstract: A novel optical-isomer separating agent for chromatography is provided which has, as a chiral selector, a macrocyclic amide compound having the ability to function as a chiral shift agent. The optical-isomer separating agent for chromatography is formed by bonding, with a carrier by chemical bonding, a specific ring structure containing an asymmetry recognition site, an amide group as a hydrogen-bond donor site, and a hydrogen-bond acceptor site.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: January 29, 2013
    Assignees: National University Corporation Okayama University, Daicel Chemical Industries, Ltd.
    Inventors: Tadashi Ema, Takashi Sakai, Daisuke Tanida, Kyoko Sugita, Atsushi Ohnishi, Kenichiro Miyazawa
  • ORGANIC-INORGANIC COMPOSITE MATERIAL AND PROCESS FOR PRODUCING SAME
    Publication number: 20120034670
    Abstract: Disclosed is an organic-inorganic composite material obtained by chemically modifying a microorganism-derived ceramic material with an organic group, and a process for producing the organic-inorganic composite material. The process is characterized by reacting a microorganism-derived ceramic material with at least one compound selected from the group consisting of silane coupling agents represented by formula (1), silane coupling agents represented by formula (2), and titanate coupling agents represented by formula (3). The organic-inorganic complex can be used in applications for immobilized catalysts and immobilized enzyme catalysts.
    Type: Application
    Filed: March 26, 2010
    Publication date: February 9, 2012
    Inventors: Takashi Sakai, Tadashi Ema, Jun Takada, Tatsuo Fujii, Makoto Nakanishi, Hideki Hashimoto
  • OPTICAL-ISOMER SEPARATING AGENT FOR CHROMATOGRAPHY AND PROCESS FOR PRODUCING THE SAME
    Publication number: 20100292464
    Abstract: A novel optical-isomer separating agent for chromatography is provided which has, as a chiral selector, a macrocyclic amide compound having the ability to function as a chiral shift agent. The optical-isomer separating agent for chromatography is formed by bonding, with a carrier by chemical bonding, a specific ring structure containing an asymmetry recognition site, an amide group as a hydrogen-bond donor site, and a hydrogen-bond acceptor site.
    Type: Application
    Filed: January 30, 2009
    Publication date: November 18, 2010
    Inventors: Tadashi Ema, Takashi Sakai, Daisuke Tanida, Kyoko Sugita, Atsushi Ohnishi, Kenichiro Miyazawa