Patents by Inventor Shunzo Aibara

Shunzo Aibara 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).

  • Tricyclic triazolopyrimidine derivatives
    Patent number: 4898943
    Abstract: Novel tricyclic triazolopyrimidine compounds represented by formula (I) shown in the specification and physiologically acceptable salts thereof are disclosed. These compounds have an excellent anti-allergic activity and are useful for treatment and prophylaxis of allergic diseases.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: February 6, 1990
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Sumiro Isoda, Shunzo Aibara, Tamotsu Miwa, Hiroyuki Fujiwara, Shuichi Yokohama, Hiroo Matsumoto
  • Thiazolo[3,2-a][1,2,3]triazolo[4,5-d]pyrimidine and [1,3,4]thiadiazolo[3,2-a][1,2,3]triazolo[4,5-d]pyrimidine derivatives
    Patent number: 4652646
    Abstract: Novel triazolopyrimidine compounds represented by the formula (I) and physiologically acceptable salts thereof are disclosed. These compounds have an excellent anti-allergic activity in oral administration and are useful for treatment and prophylaxis of allergic diseases such as bronchial asthma, allergic gastro-intestinal disorders, allergic rhinitis, hay fever, urticaria and the like.
    Type: Grant
    Filed: April 25, 1985
    Date of Patent: March 24, 1987
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Sumiro Isoda, Norio Suzuki, Tamotsu Miwa, Shunzo Aibara
  • Anti-ulcerous tyrosine derivatives
    Patent number: 4097608
    Abstract: Compounds having the formula ##STR1## wherein R.sub.1 is phenyl or cycloalkyl and the phenyl may have at least one substituent selected from the group consisting of lower alkyl, lower alkoxy, amino and nitro; R.sub.2 is hydrogen or lower alkyl; A is --CH.sub.2 O-- or --CH.sub.2 CH(O-lower alkyl)-; n is zero (0) or one (1); when R.sub.1 together with (A).sub.n is unsubstituted phenyl, R.sub.2 is lower alkyl; and R.sub.3 is hydrogen or lower alkoxy, have anti-ulcerous action.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: June 27, 1978
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Tosaku Miki, Yasuhiro Hosokawa, Tamotsu Miwa, Hiroshi Fujita, Masahide Asano, Shunzo Aibara
  • Tyrosine derivatives and process for preparing the same
    Patent number: 4057629
    Abstract: Compounds having the formula: ##STR1## wherein R.sub.1 is phenyl or cycloalkyl and the phenyl may have at least one substituent selected from the group consisting of lower alkyl, lower alkoxy, amino and nitro; R.sub.2 is hydrogen or lower alkyl; A is --CH.sub.2 O-- or --CH.sub.2 CH(O-lower alkyl)-; n is zero (0) or one (1); when R.sub.1 together with (A).sub.n is unsubstituted phenyl, R.sub.2 is lower alkyl; and R.sub.3 is hydrogen or lower alkoxy, have anti-ulcerousaction.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: November 8, 1977
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Tosaku Miki, Yasuhiro Hosokawa, Tamotsu Miwa, Hiroshi Fujita, Masahide Asano, Shunzo Aibara
  • Tyrosine derivatives and use
    Patent number: 4025644
    Abstract: Compounds having the formula: ##STR1## wherein R.sub.1 is phenyl or cycloalkyl and the phenyl may have at least one substituent selected from the group consisting of lower alkyl, lower alkoxy, amino and nitro; R.sub.2 is hydrogen or lower alkyl; A is --CH.sub.2 O-- or --CH.sub.2 CH(O-lower alkyl)-; n is zero or 1 when R.sub.1 together with (A).sub.n is unsubstituted phenyl, R.sub.2 is lower alkyl; and R.sub.3 is hydrogen or lower alkoxy, have anti-ulcerousaction.
    Type: Grant
    Filed: December 9, 1975
    Date of Patent: May 24, 1977
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Tosaku Miki, Yasuhiro Hosokawa, Tamotsu Miwa, Hiroshi Fujita, Masahide Asano, Shunzo Aibara
  • Method for treating peptic ulcers
    Patent number: 3995055
    Abstract: A method for treating peptic ulcers comprising administering a therapeutically effective amount of a compound of the general formula (I) ##SPC1##wherein Q is an unsubstituted or substituted phenyl or .beta.-naphthyl group, the substituted phenyl group being selected from the group consisting of a p-halophenyl group, an o-alkoxy-p-formylphenyl group, a diphenyl group, a p-carboxyvinylphenyl group, a p-carboxyphenyl group, a p-(.beta.-aminocarboxyethyl)phenyl group and a p-carboxy lower alkyl-phenyl group, or a pharmaceutical composition containing a therapeutically effective amount of a compound of the general formula (I) as an active ingredient to a patient afflicted therewith.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: November 30, 1976
    Assignee: Daiichi Seiyaku Co., Ltd.
    Inventors: Mitsuhiko Sentoku, Hiroshi Fujita, Shunzo Aibara