Patents by Inventor Keiichi Munakata

Keiichi Munakata 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).

  • Novel hydroxamic acid compounds, method for preparation thereof and medicaments containing such compounds
    Patent number: 4256765
    Abstract: A novel hydroxamic acid compound represented by the general formula:R.sub.1 --CONHCH.sub.2 CONHOHwherein R.sub.1 is an alkyl, cycloalkyl or cycloalkyl alkyl group having from 4 to 11 carbon atoms, and pharmacologically acceptable salt thereof, and a method for the preparation of the above-mentioned compound and salt, and a novel medicament for the treatment of urolithiasis and pyelonephritis, containing the above-mentioned compound or salt as an active ingredient.
    Type: Grant
    Filed: September 18, 1979
    Date of Patent: March 17, 1981
    Assignee: Eisai Co., Ltd.
    Inventors: Keiichi Munakata, Satoru Tanaka, Tamotsu Kanazawa, Masaru Satoh, Jun-ichi Hase, Kyoichi Kobashi
  • Hydroxamic acid derivatives and medicaments for treatment of urolithiasis and pyelonephrosis comprising such derivatives
    Patent number: 4157396
    Abstract: A novel compound having the general formula: ##STR1## wherein R.sub.1 is a residual group selected from the group consisting of substituted phenyl, carbonoylaminophenyl and heterocyclic groups, and R.sub.2 is hydrogen or methyl group, and its salts of a pharmacologically acceptable base and a novel medicament containing the compound or its salt mentioned above as a principal component; and the compound and the salt thereof having superior effect for the treatment of urolithiasis and the pyelonephrosis by exhibiting a strong urease inhibitory action, a high transfer rate into the urine and a low toxicity.
    Type: Grant
    Filed: January 26, 1978
    Date of Patent: June 5, 1979
    Assignee: Eisai Co., Ltd.
    Inventors: Satoru Tanaka, Keiichi Munakata
  • Novel hydroxamic acid derivatives and medicaments for treatment of urolithiasis and pyelonephrosis comprising such derivatives
    Patent number: 4083996
    Abstract: A novel compound having the general formula: ##STR1## wherein R.sub.1 is a residual group selected from the group consisting of substituted phenyl, carbonoylaminophenyl and heterocyclic groups, and R.sub.2 is hydrogen or methyl group, and its salts of a pharmacologically acceptable base and a novel medicament containing the compound or its salt mentioned above as a principal component; and the compound and the salt thereof having superior effect for the treatment of urolithiasis and the pyelonephrosis by exhibiting a strong urease inhibitory action, a high transfer rate into the urine and a low toxicity.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: April 11, 1978
    Assignee: Eisai Co., Ltd.
    Inventors: Satoru Tanaka, Keiichi Munakata
  • M-phenoxyphenyl propionic acid derivatives and preparation thereof
    Patent number: 3985779
    Abstract: New meta-phenoxyphenyl propionic acid derivatives and pharmacologically acceptable salts thereof having excellent anti-inflammatory and analgesic activities with low toxicity are provided. The new compounds are adapted for therapeutical treatment of various inflammatory diseases by oral administration without injurious by-effects; successive administrations for an elongated period are not accompanied with an appreciable gastric irritability and the like.
    Type: Grant
    Filed: October 29, 1974
    Date of Patent: October 12, 1976
    Assignee: Eisai Co., Ltd.
    Inventors: Satoru Tanaka, Kazunori Hashimoto, Hideaki Watanabe, Keiichi Munakata