Patents by Inventor Nobuya Katagiri

Nobuya Katagiri 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).

  • Cyclopentenecarboxamide derivative, method for preparing the same and bicycloamide derivative used therein
    Patent number: 6482957
    Abstract: A cyclopentenecarboxamide derivative represented by the formula (I): and a method for preparing the cyclopentencarboxamide derivative. A bicycloamide derivative represented by the formula (II): and a method for preparing the bicycloamide derivative.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: November 19, 2002
    Assignee: Kuraray Co., Ltd.
    Inventors: Nobuya Katagiri, Chikara Kaneko, Junko Sato, Masahiro Torihara, Koichi Kanehira, Yoshin Tamai
  • Cyclopentenecarboxamide derivative, method for preparing the same bicycloamide derivative used therein
    Patent number: 6452004
    Abstract: A cyclopentenecarboxamide derivative represented by the formula (I): and a method for preparing the cyclopentencarboxamide derivative. A bicycloamide derivative represented by the formula (II): and a method for preparing the bicycloamide derivative.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: September 17, 2002
    Assignee: Kuraray Co., Ltd.
    Inventors: Nobuya Katagiri, Chikara Kaneko, Junko Sato, Masahiro Torihara, Koichi Kanehira, Yoshin Tamai
  • Cyclopentenecarboxamide derivative, method for preparing the same and bicycloamide derivative used therein
    Publication number: 20020115857
    Abstract: A cyclopentenecarboxamide derivative represented by the formula (I): 1
    Type: Application
    Filed: April 25, 2002
    Publication date: August 22, 2002
    Applicant: Kuraray Co., Ltd.
    Inventors: Nobuya Katagiri, Chikara Kaneko, Junko Sato, Masahiro Torihara, Koichi Kanehira, Yoshin Tamai
  • Cyclopentenecarboxamide derivative, method for preparing the same and bicycloamide derivative used therein
    Patent number: 6127539
    Abstract: A cyclopentenecarboxamide derivative represented by the formula (I): ##STR1## and a method for preparing the cyclopentencarboxamide derivative. A bicycloamide derivative represented by the formula (II): ##STR2## and a method for preparing the bicycloamide derivative.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: October 3, 2000
    Assignee: Kuraray Co., Ltd.
    Inventors: Nobuya Katagiri, Chikara Kaneko, Junko Sato, Masahiro Torihara, Koichi Kanehira, Yoshin Tamai
  • Cyclopentenecarboxamide derivative, method for preparing the same and bicycloamide derivative used therein
    Patent number: 5817812
    Abstract: A cyclopentenecarboxamide derivative represented by the formula (I): ##STR1## and a method for preparing the cyclopentencarboxamide derivative. A bicycloamide derivative represented by the formula (II): ##STR2## and a method for preparing the bicycloamide derivative.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: October 6, 1998
    Assignee: Kuraray Co., Ltd.
    Inventors: Nobuya Katagiri, Chikara Kaneko, Junko Sato, Masahiro Torihara, Koichi Kanehira, Yoshin Tamai
  • Process for producing cyclobutane derivative
    Patent number: 5202459
    Abstract: The present invention relates to a process for producing cyclobutane derivatives represented by general formula (28): ##STR1## (wherein R represents a substituent; R.sub.2 represents an electron attracting group and Nu represents a substituent corresponding to nucleophilic reagent), by reacting a compound represented by general formula (27): ##STR2## (wherein R has the same significance as defined above and R.sub.1 represents an electron attracting group) with nucleophilic reagents Nu.sup..crclbar. in a solvent.The compounds of formula (28) are useful as intermediates for synthesis of, for example, 9-[2,3-bis(hydroxymethyl)cyclobutan-1-yl]guanine which is expected to be useful as an antiviral agent.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: April 13, 1993
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Chikara Kaneko, Nobuya Katagiri
  • Method and composition for treating arteriosclerosis
    Patent number: 4788200
    Abstract: A medicament for curing arteriosclerosis which comprises pyrimido [2,1-b] benzothiazole derivative.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: November 29, 1988
    Assignee: MECT Corporation
    Inventors: Ryuji Niwa, Nobuya Katagiri, Tetsuzo Kato, Yoshiyasu Shitori, Jiro Horiuchi
  • 3-oxo-2-azabicyclohexane derivatives
    Patent number: 4754029
    Abstract: 3-Oxo-2-azabicyclohexane derivatives represented by the general formula: ##STR1## wherein R.sub.1 represents an optically active menthoxy group or an optically active 1-phenylethoxy group when R.sub.2 and R.sub.3 are combined to form a bond; when R.sub.3 is a hydrogen atom, R.sub.1 and R.sub.2 are combined to form an oxo group or, R.sub.2 is a hydrogen atom and R.sub.1 is a hydroxy group or a lower alkanoyloxy group. The 3-oxo-2-azabicyclohexane derivatives are novel compounds useful as intermediates for antibacterial agents.
    Type: Grant
    Filed: March 26, 1986
    Date of Patent: June 28, 1988
    Assignee: Eisai Co., Ltd.
    Inventors: Chikara Kaneko, Masayuki Sato, Nobuya Katagiri
  • Cyclic pyrazolo C-nucleoside compound and process for preparing the same
    Patent number: 4656260
    Abstract: A novel compound, 3-(.beta.-D-ribofranosyl)pyrazolo-[3,4-e] [1,3]oxazine-5,7-dione, exhibiting a function of inhibiting propagation or growth of various virus, and a process for preparing the same.
    Type: Grant
    Filed: December 27, 1984
    Date of Patent: April 7, 1987
    Assignee: Kanto Ishi Pharmaceutical Co., Ltd.
    Inventors: Tetsuzo Kato, Nobuya Katagiri