Patents by Inventor Zen Itoh

Zen Itoh 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).

  • Erythromycin derivative
    Patent number: 5175150
    Abstract: Disclosed are novel erythromycin derivatives, or salts thereof, represented by the following general formula: ##STR1## and processes for preparing the same. The erythromycin derivatives described above have an excellent effect of stimulating the gastrointestinal contractile motion and have low toxicity, and the preparations containing these compounds can be advantageously used as digestive tract contractile motion stimulants.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: December 29, 1992
    Assignee: Kitasato, Kenkyusho
    Inventors: Satoshi Omura, Zen Itoh
  • Therapeutic method of stimulating digestive tract contractile motion in mammals
    Patent number: 5008249
    Abstract: Disclosed are digestive tract contractile motion stimulants containing compounds, or salts thereof, represented by the following general formula: ##STR1## The compounds described above have an excellent effect of stimulating the gastrointestinal contractile motion, and the preparation of the present invention containing these compounds can be advantageously used as digestive tract contractile motion stimulants.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: April 16, 1991
    Assignee: Kitasato Kenkyusho
    Inventors: Satoshi Omura, Zen Itoh
  • A method of promoting the growth of domestic animals with erythromycin derivative containing composition
    Patent number: 4948782
    Abstract: A growth promoting composition for animals containing an erythromycin derivative wherein a dimethylamino radical of the 3'-position is converted into a primary amino radical, a secondary amino radical, a tertiary amino radical other than the dimethyl amino radical, or a quaternary ammonio radical.This composition does not exhibit the antimicrobial activity at all or show the extremely decreased antimicrobial activity, and has the excellent effect to improve the feed efficiency of domestic animals.
    Type: Grant
    Filed: February 18, 1988
    Date of Patent: August 14, 1990
    Assignee: Kitasato Kenkyusho
    Inventors: Satoshi Omura, Zen Itoh
  • Compositions for inducing contractile motility of the gastrointestinal tract
    Patent number: 4677097
    Abstract: A pharmaceutical composition for inducing contractile motility of the gastrointestinal tract in humans and animals, comprising as active ingredient 8,9-anhydroerythromycin 6,9-hemiketals, anhydroerythromycins, derivatives thereof and/or pharmaceutically acceptable salts thereof, in association with a pharmaceutically acceptable carrier or excipient. The active compounds may be produced by chemical modification of erythromycin and exhibit no or little antimicrobial activity. By administering the present composition to humans and animals, contractile motility of the gastrointestinal tract similar to the motility occurring naturally under normal conditions may be effectively induced.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: June 30, 1987
    Assignee: Kitasato Kenkyusho
    Inventors: Satoshi Omura, Zen Itoh