Patents by Inventor Tetsuya Uto

Tetsuya Uto 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 jet recording sheet and method for producing it
    Patent number: 6670002
    Abstract: An ink jet recording sheet which comprises a support and an ink-receiving layer formed on at least one side of the support, said ink-receiving layer comprising a pigment, colloidal particles or a mixture thereof, and a binder resin, as the main components, wherein the ink-receiving layer contains at least one organic titanium compound of the following formula 1 or 2: wherein R is hydrogen or CmH2m+1, provided that m is 3 or 4, R′ is hydrogen, NH4+ or CnH2n+1, provided that n is an integer of from 1 to 3, and x is an integer of from 1 to 3,  wherein R″ is CpH2p, provided that p is an integer of from 5 to 8, R′″ is CqH2q+1, provided that q is 3 or 4, and y is an integer of from 1 to 3.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: December 30, 2003
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Hideki Sekiguchi, Tetsuya Uto, Jun Urasaki
  • Ink jet recording material for non-aqueous ink
    Patent number: 6616991
    Abstract: An ink jet recording material for a non-aqueous ink, comprising an ink-receiving layer provided on a support and a polymer soluble or swellable in a petroleum type high boiling solvent, wherein the polymer is a liquid rubber.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: September 9, 2003
    Assignee: Mitsubishi Paper Mills Limited
    Inventor: Tetsuya Uto
  • Ink jet recording sheet
    Patent number: 6338891
    Abstract: The present invention provides an ink jet recording sheet excellent in ink absorption properties, surface gloss, transparency and color of recorded images. The ink jet recording sheet has a gloss like photographic papers and has a high transparency, and can be used as OHP films. In this ink jet recording sheet, an ink receiving layer containing a pseudo-boehmite alumina hydrate and a binder is provided on a support, the ratio of a pore volume of the pores having a radius of 13 nm or more and less than 50 nm to a pore volume of the pores having a radius of 3 nm or more and less than 13 nm is 0.3-0.9 or the pore volume of the pores having a radius of 13 nm or more and less than 50 nm is 0.1-0.5 ml/g. Furthermore, the ink receiving layer has a surface pH of 4.0-5.4.
    Type: Grant
    Filed: July 21, 1998
    Date of Patent: January 15, 2002
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Katsuhiko Kawasaki, Tetsuya Uto, Mitsuhiro Ikeda
  • Ink jet recording material for non-aqueous ink
    Publication number: 20010017643
    Abstract: An ink jet recording material for non-aqueous ink, which comprises an ink-absorbing layer containing at least a pigment on a support, the ink-absorbing layer being coated or impregnated with a polymer soluble or swellable in a petroleum system high boiling point solvent, wherein at least 30 wt % of the pigment is calcium carbonate.
    Type: Application
    Filed: January 30, 2001
    Publication date: August 30, 2001
    Applicant: MITSUBISHI PAPER MILLS LIMITED
    Inventors: Tetsuya Uto, Takao Senga, Kunio Kasamatsu