Patents by Inventor Koromo Shirota

Koromo Shirota 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).

  • Ink, ink jet recording method employing the same, and apparatus or tool employing the same
    Patent number: 5151128
    Abstract: An ink includes: a recording agent; a liquid carrier medium; and an alkylether of polyoxyethylene-polyoxypropylene random polymer having the following general formula [I]:R.sub.1 --(X)--O--R.sub.2 [I]wherein R.sub.1 and R.sub.2 each is a hydrogen atom or an alkyl group, with the proviso that they cannot both be a hydrogen atom, and X is a random polymer of ethylene oxide and polypropylene oxide.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: September 29, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kyouko Fukushima, Koromo Shirota, Shouji Koike
  • Ink, ink-jet recording process, and instrument using the ink
    Patent number: 5141558
    Abstract: Provided in an ink comprising a recording agent and a liquid medium capable of dissolving or dispersing the recording agent, wherein said ink comprises a triol selected from the group consisting of the following (a) to (c):(a) a straight-chain triol having 5 carbon atoms;(b) a compound of the formula ##STR1## wherein any three of A.sub.1 to A.sub.5 each represent a hydroxyl group, and the remaining two each represent a hydrogen atom, or a branched triol having 6 carbon atoms; and(c) a triol having 7 or more carbon atoms.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: August 25, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koromo Shirota, Kyoko Fukushima, Shoji Koike
  • Ink, ink-jet recording process, and instrument using the ink
    Patent number: 5118351
    Abstract: Provided is an ink comprising a recording agent and a liquid medium capable of dissolving or dispersing the recording agent, wherein said ink comprises from 0.1% to 10% by weight of a water-soluble dye, from 75% to 95% by weight of water and from 4% to 20% by weight of a mixture of 1,2,6-hexanetriol and an addition polymer of ethylene oxide.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: June 2, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koromo Shirota, Kyoko Fukushima, Shoji Koike