Patents by Inventor Hiroki Tatsumi

Hiroki Tatsumi 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).

  • Publication number: 20220185824
    Abstract: Disclosed is a ?-conjugated compound that has a structure of the following Formula (1) and a HOMO level of ?5.3 eV or higher, in the formula, M represents CX1 or a nitrogen atom, X1 to X6 each represent an aromatic substituent or an aromatic heterocyclic group, in which at least four of X1 to X6 are electron-donating condensed aromatic ring substituents with 14 or more n electrons, and at least one of X1 to X6 is an electron-attracting substituent, and X1 to X6 may each independently further have a substituent.
    Type: Application
    Filed: February 14, 2020
    Publication date: June 16, 2022
    Inventors: Ryutaro SUGAWARA, Kazuma ODA, Hiroki TATSUMI
  • Publication number: 20220135874
    Abstract: An infrared-emitting compound has a structure represented by the following Formula (1a). In Formula (1a), Ar and ring A each independently represent an aryl ring, a heteroaryl ring or a fused ring thereof. Q-Ar represents an infrared-emitting residue. R1 represents a group in which a dihedral angle between Ar and ring A is 45 degree or more. And a thick line represents a single bond or a double bond.
    Type: Application
    Filed: February 21, 2020
    Publication date: May 5, 2022
    Inventors: Yasuo MIYATA, Noriko UEDA, Hiroki TATSUMI, Ryo NAKABAYASHI
  • Patent number: 6787325
    Abstract: Provided are novel complexes containing a crosslinked avidin, an analyzing method and analyzing reagents and kits whereby a compound to be analyzed can be quickly, conveniently and accurately analyzed while taking advantage of the avidin-biotin reaction. The complexes contain at least two homogeneous or heterogeneous biotin-introduced products and one crosslinked avidin sandwiched therebetween. In the analyzing method, the homogeneous or heterogeneous biotin-introduced products and the crosslinked avidin are used. The analyzing reagent contains the crosslinked avidin. The analyzing kit contains the crosslinked avidin and a biotinylating agent.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: September 7, 2004
    Assignees: Iatron Laboratories, Inc., Kikkoman Corporation
    Inventors: Kazuyuki Sugiyama, Nobuhiro Hoshino, Hiroki Tatsumi, Satoshi Fukuda
  • Patent number: 6521304
    Abstract: The present invention relates to luminescent playthings such as candles, table lights, pen lights, illumination, illuminating playthings for camp, illuminating playthings for night fishing, fish-gathering lamps, safety candles, neon lights, luminescent inks, luminescent pens, luminescent coatings or luminescent writing implements, in which a soft light of an indescribable tone of color not obtainable from flames of conventional candles is emitted via seawater, lake and marsh water, river water, ground water, tap water or mineral drinking water by utilizing 3 components of luciferin, luciferase and ATP or 4 components of these components plus a metal salt, out of components necessary for bioluminescence in fireflies.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: February 18, 2003
    Assignee: Kikkoman Corporation
    Inventors: Naoki Kajiyama, Ayumi Arai, Eiichi Nakano, Hiroki Tatsumi, Teruo Watarai, Naoki Eisaki, Tatsuya Sakakibara, Masaru Suzuki
  • Patent number: 6054305
    Abstract: Disclosed are a pyruvate orthophosphate dikinase gene coding for a polypeptide containing the amino acid sequence of SEQ ID NO:1 or an amino acid sequence where in said amino acid sequence one or more amino acids are added, deleted or substituted and bringing about the activity of pyruvate orthophosphate dikinase; recombinant DNA having the pyruvate orthophosphate dikinase gene integrated in vector DNA; and a process for producing pyruvate orthophosphate dikinase, which comprises culturing a microorganism belonging to the genus Escherichia carrying the above recombinant DNA in a medium, and recovering pyruvate orthophosphate dikinase from the resulting culture. The pyruvate orthophosphate dikinase gene and a process for producing pyruvate orthophosphate dikinase are provided.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: April 25, 2000
    Assignee: Kikkoman Corporation
    Inventors: Hiroki Tatsumi, Naoki Eisaki, Tatsuo Horiuchi, Ayumu Nagahara
  • Patent number: 5843746
    Abstract: The present invention relates to biotinated firefly luciferase comprising a biotinated peptide and firefly luciferase linked therein, biotinated firefly luciferase having a specific amino acid sequence, a biotinated firefly luciferase gene comprising a gene coding for a biotinated peptide and a firefly luciferase gene linked therein, a biotinated firefly luciferase gene comprising a biotinated peptide gene coding for a specific amino acid sequence and a firefly luciferase gene linked therein, a recombinant DNA comprising said biotinated firefly luciferase gene inserted into a vector DNA, a process for producing biotinated firefly luciferase comprising culturing a microorganism belonging to the genus Escherichia carrying said recombinant DNA and then recovering the resulting biotinated firefly luciferase from the culture, a bioluminescent analysis method comprising using said biotinated firefly luciferase, and a bioluminescent analysis method comprising quantifying a ligand by measuring a biotinated receptor b
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: December 1, 1998
    Assignee: Kikkoman Corporation
    Inventors: Hiroki Tatsumi, Satoshi Fukuda, Mamoru Kikuchi, Yasuji Koyama
  • Patent number: 5814465
    Abstract: The present invention relates to biotinated firefly luciferase comprising a biotinated peptide and firefly luciferase linked therein, biotinated firefly luciferase having a specific amino acid sequence, a biotinated firefly luciferase gene comprising a gene coding for a biotinated peptide and a firefly luciferase gene linked therein, a biotinated firefly luciferase gene comprising a biotinated peptide gene coding for a specific amino acid sequence and a firefly luciferase gene linked therein, a recombinant DNA comprising said biotinated firefly luciferase gene inserted into a vector DNA, a process for producing biotinated firefly luciferase comprising culturing a microorganism belonging to the genus Escherichia carrying said recombinant DNA and then recovering the resulting biotinated firefly luciferase from the culture, a bioluminescent analysis method comprising using said biotinated firefly luciferase, and a bioluminescent analysis method comprising quantifying a ligand by measuring a biotinated receptor b
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: September 29, 1998
    Assignee: Kikkoman Corporation
    Inventors: Hiroki Tatsumi, Satoshi Fukuda, Mamoru Kikuchi, Yasuji Koyama
  • Patent number: 5352598
    Abstract: A purified luciferase from Luciola lateralis is disclosed. The enzyme is characterized by having properties including: an optimum pH range of 7.5 to 9.5, an optimum temperature range of 0.degree. C. to 50.degree. C., and that the enzyme does not act on ADP, CTP, UTP, and GTP. The enzyme is purified by using a process which includes: gel filtration chromatography, hydroxyapatite column chromatography, and a tris(hydroxy)aminomethane-hydro-chloric acid buffer.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: October 4, 1994
    Assignee: Kikkoman Corporation
    Inventors: Naoki Kajiyama, Tsutomu Masuda, Hiroki Tatsumi, Eiichi Nakano
  • Patent number: 5334511
    Abstract: The present invention provides an improved mink growth hormone gene, a recombinant DNA containing the improved mink growth hormone gene, microorganisms which belong to the genus Escherichia and contain the recombinant DNA and which are capable of producing a mink growth hormone, and a method for producing a mink growth hormone using the E.coli transformant containing the recombinant DNA. According to the present invention, a mink growth hormone is efficiently produced.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: August 2, 1994
    Assignee: Kikkoman Corporation
    Inventors: Yasuhiro Harada, Eiichi Nakano, Hiroki Tatsumi, Motoaki Umezu
  • Patent number: 5254470
    Abstract: Alkaline protease which has leucine or isoleucine in the place of valine at the amino acid number 40 of wild type alkaline protease, a gene encoding the amino acid sequence of alkaline protease which has the substitution as described above, a recombinant DNA comprising said gene, a method of producing the above described alkaline protease, and a DNA fragment used for the expression of a gene.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: October 19, 1993
    Assignee: Japanese Research and Development Association for Improvement of Enzyme Function in Food Industry
    Inventors: Seiji Murakami, Hiroki Tatsumi, Yoshihiro Ogawa, Eiichi Nakano, Hiroshi Motai, Shigetoshi Sugio, Atsushi Masaki, Yutaka Ishida, Kohji Murakami, Haruhide Kawabe, Hirofumi Arimura
  • Patent number: 5182202
    Abstract: Disclosed is a purified luciferase and a method for making it. The luciferase is obtained from Luciola cruciata. The luciferase has a pH range for stabililty of 6.5-9.0 and a optimum pH range of 8.0-9.5. The enzyme does not act on ADP, CTP, UTP and GTP.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: January 26, 1993
    Assignee: Kikkoman Corporation
    Inventors: Naoki Kajiyama, Tsutomu Masuda, Hiroki Tatsumi, Eiichi Nakano
  • Patent number: 4968613
    Abstract: A luciferase gene isolated from Luciola cruciata (Japanese firefly) coding for an amino acid sequence shown in FIG. 4 and a novel recombinant DNA characterized by incorporating a gene coding for luciferase into a vector DNA are disclosed. There is also disclosed a method of producing luciferase which comprises culturing in a medium a microorganism containing a recombinant DNA having inserted a gene coding for luciferase in a vector DNA and belonging to the genus Escherichia capable of producing luciferase and collecting luciferase from the culture.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: November 6, 1990
    Assignee: Kikkoman Corporation
    Inventors: Tsutomu Masuda, Hiroki Tatsumi, Eiichi Nakano