Patents by Inventor Rikizo Horikawa

Rikizo Horikawa 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).

  • Sampling valve for use in high-speed liquid chromatography
    Patent number: 4577515
    Abstract: A sampling valve for use in high-speed liquid chromatography comprising a first stator having therein a sample injection flow passage and a solution flow passage, a second stator (B; G; J) having therein solution flow passages and a discharge passage, and a rotor having therein three or more sample holding bores of different diameter, said rotor being rotatably interposed between said first and second stators.
    Type: Grant
    Filed: June 19, 1984
    Date of Patent: March 25, 1986
    Assignee: Tokyo Rika Kikai Co., Ltd.
    Inventors: Noboru Someya, Rikizo Horikawa