Patents by Inventor Tamayo Okahira

Tamayo Okahira 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).

  • Patent number: 8440744
    Abstract: The present invention is proposed is an oil-based white ink composition for ink jet recording, comprising a white pigment, a glycol ether dialkyl ether compound solvent, a polymeric dispersant, and a specific acrylic resin. The white pigment is formed of titanium oxide fine particles having an average particle diameter of not less than 0.15 ?m and not more than 0.25 ?m and coated with at least one of aluminum oxide and silicon oxide. The white pigment is further coated with not less than 0.01% by mass and not more than 2.5% by mass of at least one of an SiH-containing polysiloxane and dimethylpolysiloxane.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: May 14, 2013
    Assignee: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Fumie Yamazaki, Tamayo Okahira
  • Patent number: 8008368
    Abstract: An oil-based ink composition for inkjet recording capable of exhibiting desired properties of drying after print, rubfastness and re-solubility is achieved by performing solubilization on an acrylic resin which is not easily dissolved conventionally. The oil-based ink composition for inkjet printing comprises glycol ether dialkyl ethers as a prime solvent; and an acrylic resin that results from solution polymerization in a solvent of the glycol ether dialkyl ethers by use of a radical polymerization initiator.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: August 30, 2011
    Assignees: Seiko Epson Corporation, The Inctec Inc.
    Inventors: Seiji Mochizuki, Makoto Otsuki, Masahiro Nakamura, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Tamayo Okahira
  • Patent number: 7960470
    Abstract: Disclosed are a process for producing a polymer composition having a high solubility in a solvent, and a polymer composition.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: June 14, 2011
    Assignee: The Inctec Inc.
    Inventor: Tamayo Okahira
  • Patent number: 7754784
    Abstract: An oil-based ink composition for inkjet printers contains a fixing polymer and a solvent represented by the following formula (1): wherein X1 represents an alkyl group, X2 represents a hydrogen atom or alkyl group, and n stands for an integer of from 1 to 4. The fixing polymer is an acrylic polymer obtained by subjecting an acrylic monomer to solution polymerization with a radical polymerization initiator in the solvent. A production process of the oil-based ink composition is also disclosed.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: July 13, 2010
    Assignee: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Tamayo Okahira
  • Publication number: 20100160554
    Abstract: Disclosed are a process for producing a polymer composition having a high solubility in a solvent, and a polymer composition.
    Type: Application
    Filed: July 28, 2006
    Publication date: June 24, 2010
    Applicant: The Inctec Inc.
    Inventor: Tamayo Okahira
  • Publication number: 20100105807
    Abstract: The present invention is proposed is an oil-based white ink composition for ink jet recording, comprising a white pigment, a glycol ether dialkyl ether compound solvent, a polymeric dispersant, and a specific acrylic resin. The white pigment is formed of titanium oxide fine particles having an average particle diameter of not less than 0.15 ?m and not more than 0.25 ?m and coated with at least one of aluminum oxide and silicon oxide. The white pigment is further coated with not less than 0.01% by mass and not more than 2.5% by mass of at least one of an SiH-containing polysiloxane and dimethylpolysiloxane.
    Type: Application
    Filed: March 26, 2008
    Publication date: April 29, 2010
    Applicant: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Fumie Yamazaki, Tamayo Okahira
  • Publication number: 20070270525
    Abstract: An oil-based ink composition for inkjet printers contains a fixing polymer and a solvent represented by the following formula (1): wherein X1 represents an alkyl group, X2 represents a hydrogen atom or alkyl group, and n stands for an integer of from 1 to 4. The fixing polymer is an acrylic polymer obtained by subjecting an acrylic monomer to solution polymerization with a radical polymerization initiator in the solvent. A production process of the oil-based ink composition is also disclosed.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 22, 2007
    Applicant: The Inctec Inc.
    Inventors: Yukio Sugita, Mitsuyoshi Tamura, Mitsuteru Yamada, Tamayo Okahira
  • Publication number: 20070167538
    Abstract: An oil-based ink composition for inkjet recording capable of exhibiting desired properties of drying after print, rubfastness and re-solubility is achieved by performing solubilization on an acrylic resin which is not easily dissolved conventionally. The oil-based ink composition for inkjet printing comprises glycol ether dialkyl ethers as a prime solvent; and an acrylic resin that results from solution polymerization in a solvent of the glycol ether dialkyl ethers by use of a radical polymerization initiator.
    Type: Application
    Filed: December 21, 2006
    Publication date: July 19, 2007
    Inventors: Seiji Mochizuki, Makoto Otsuki, Masahiro Nakamura, Yukio Sugita, Mitsuyoshi Tamura, Fumie Yamazaki, Tamayo Okahira