Patents by Inventor Rumiko Kitagawa

Rumiko Kitagawa 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).

  • Publication number: 20200215226
    Abstract: To provide a medical device including a substrate and a hydrophilic polymer layer formed on at least a part of the substrate, which satisfies the following conditions (a) to (d): (a) a polymer constituting the hydrophilic polymer layer is a hydrophilic polymer having an acidic group; (b) the hydrophilic polymer layer has a thickness of 1 nm or more and less than 100 nm; (c) a number ratio of basic group/acidic group of the hydrophilic polymer layer is 0.2 or less; and (d) a liquid film retention time at 40 minutes after ultrasonic cleaning in a phosphate buffer solution is 15 seconds or more. The present invention provides a medical device in which a surface of a substrate is hydrophilized, and a method for manufacturing same by a simple method.
    Type: Application
    Filed: August 7, 2018
    Publication date: July 9, 2020
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20200139653
    Abstract: The present invention provides a method for producing a medical device, which includes a step of disposing a solution containing a hydrophilic polymer having a hydroxyl group and an amide group and a substrate on or in a support, and heating the solution and the substrate through the support, wherein a pH of the solution before starting the heating step is in a range of 2.0 or higher and 6.0 or lower, and a pH of the solution after completion of the heating step is in a range of 2.0 or higher and 6.0 or lower. The present invention provides a method for simply producing a medical device. More particularly, the present invention provides a method for simply producing a medical device whose surface is hydrophilized.
    Type: Application
    Filed: April 26, 2018
    Publication date: May 7, 2020
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 10591749
    Abstract: Disclosed is a medical device having an elastic modulus of 100 kPa or more and 2,000 kPa or less, a water content of 10% by mass or less, a tensile elongation of 50% or more and 3,000% or less, and a dynamic contact angle (advancing angle) relative to a borate buffer of 80° or less. The present invention can significantly reduce or avoid a phenomenon of adhesion to a surface when contacted with a surface outside or inside the body, which has hitherto been regarded as a problem in a conventional medical device.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: March 17, 2020
    Assignee: Toray Industries, Inc.
    Inventors: Masataka Nakamura, Rumiko Kitagawa, Ryuta Tamiya
  • Patent number: 10398639
    Abstract: A skin adhesive sheet is disclosed which is good in tackiness to the skin surface, does not easily dry even when used for a long time, can maintain flexibility, and is small in the shape variation. The skin adhesive sheet includes a copolymer containing the following components A and C as polymerization components, and having a water content less than 10% by mass: component A: a polysiloxane macromonomer having a plurality of polymerizable functional groups per molecule, and having a number average molecular weight of 6,000 or more; and component C: a polymerizable monomer having an alkyl group and having no fluoroalkyl group.
    Type: Grant
    Filed: May 27, 2015
    Date of Patent: September 3, 2019
    Assignee: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20190022282
    Abstract: A device includes a substrate and a hydrophilic polymer layer made of a hydrophilic polymer having a hydroxyl group. The hydrophilic polymer layer having a hydroxyl group is fixed to at least a part of a surface of the substrate and the hydrophilic polymer further has an amide group. A liquid film retention time of the device is 15 seconds or more. The device has a surface of a substrate which is hydrophilized. A method for producing the device by a simple method is also disclosed.
    Type: Application
    Filed: February 22, 2017
    Publication date: January 24, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20190015542
    Abstract: Disclosed is a device including a substrate and a gel layer made of a hydrophilic polymer having a hydroxyl group. The gel layer is fixed to at least a part on a surface of the substrate in a thickness of 1 nm to 3,000 nm and an elastic modulus of a device surface is 6.00×103 Pa or less.
    Type: Application
    Filed: February 22, 2017
    Publication date: January 17, 2019
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20180125775
    Abstract: A skin adhesive sheet is disclosed which is good in tackiness to the skin surface, does not easily dry even when used for a long time, can maintain flexibility, and is small in the shape variation. The skin adhesive sheet includes a copolymer containing the following components A and C as polymerization components, and having a water content less than 10% by mass: component A: a polysiloxane macromonomer having a plurality of polymerizable functional groups per molecule, and having a number average molecular weight of 6,000 or more; and component C: a polymerizable monomer having an alkyl group and having no fluoroalkyl group.
    Type: Application
    Filed: May 27, 2015
    Publication date: May 10, 2018
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 9778488
    Abstract: A medical device includes a layer made of an acidic polymer and a basic polymer formed on at least a part of a surface of a water-containing base material, wherein at least one kind of an acidic polymer and a basic polymer forming the acidic polymer or the basic polymer is a polymer having a hydroxy group.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: October 3, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 9753187
    Abstract: Provided are a low hydrous soft ophthalmic lens that can remarkably reduce or avoid a phenomenon in which a lens sticks to a cornea when worn and can reduce a decrease in the performance of a coating layer when rubbing the low hydrous soft ophthalmic lens for cleaning and a method for manufacturing the same. The low hydrous soft ophthalmic lens has a layer formed of a hydrophilic polymer on at least part of the surface of a base material containing a polysiloxane compound, and at least part of the inside of the layer is cross-linked.
    Type: Grant
    Filed: August 15, 2012
    Date of Patent: September 5, 2017
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Rumiko Kitagawa, Masataka Nakamura, Satoru Ogasahara
  • Patent number: 9632212
    Abstract: To provide a medical device which is excellent in wettability and lubricity and is also scarcely broken since it is soft, by a medical device in which a layer made of an acidic polymer and a basic polymer is formed on at least a part of a surface of a low water content soft base material, the low water content soft base material containing, as a main component, a copolymer containing a monofunctional monomer component M having one polymerizable functional group and one silicone moiety per molecule.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: April 25, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 9377562
    Abstract: A medical device includes a layer made of an acidic polymer and a basic polymer formed on at least a part of a surface of a base material, wherein at least one kind of an acidic polymer and a basic polymer forming the layers made of the acidic polymer and the basic polymer is a multi-component copolymer of three or more components.
    Type: Grant
    Filed: August 14, 2012
    Date of Patent: June 28, 2016
    Assignee: TORAY INDUSTRIES, INC.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Patent number: 9297930
    Abstract: A low water content soft lens for eye is provided, which includes a layer made of an acidic polymer and a basic polymer on at least a part of a surface of a base material containing a polysiloxane compound. Adhesion of the lens to the cornea during wear, which has hitherto been regarded as a problem in a conventional low water content soft lens for eye, can be reduced or avoided when using the low water content soft lens.
    Type: Grant
    Filed: January 12, 2015
    Date of Patent: March 29, 2016
    Assignee: Toray Industries, Inc.
    Inventors: Masataka Nakamura, Rumiko Kitagawa, Tsutomu Goshima
  • Publication number: 20150177417
    Abstract: A low water content soft lens for eye is provided, which includes a layer made of an acidic polymer and a basic polymer on at least a part of a surface of a base material containing a polysiloxane compound. Adhesion of the lens to the cornea during wear, which has hitherto been regarded as a problem in a conventional low water content soft lens for eye, can be reduced or avoided when using the low water content soft lens.
    Type: Application
    Filed: January 12, 2015
    Publication date: June 25, 2015
    Applicant: Toray Industries, Inc.
    Inventors: Masataka Nakamura, Rumiko Kitagawa, Tsutomu Goshima
  • Patent number: 9046644
    Abstract: A low water content soft lens for eye is provided, which includes a layer made of an acidic polymer and a basic polymer on at least a part of a surface of a base material containing a polysiloxane compound. Adhesion of the lens to the cornea during wear, which has hitherto been regarded as a problem in a conventional low water content soft lens for eye, can be reduced or avoided when using the low water content soft lens.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: June 2, 2015
    Assignee: Toray Industries, Inc.
    Inventors: Masataka Nakamura, Rumiko Kitagawa, Tsutomu Goshima
  • Publication number: 20140333893
    Abstract: Provided are a low hydrous soft ophthalmic lens that can remarkably reduce or avoid a phenomenon in which a lens sticks to a cornea when worn and can reduce a decrease in the performance of a coating layer when rubbing the low hydrous soft ophthalmic lens for cleaning and a method for manufacturing the same. The low hydrous soft ophthalmic lens has a layer formed of a hydrophilic polymer on at least part of the surface of a base material containing a polysiloxane compound, and at least part of the inside of the layer is cross-linked.
    Type: Application
    Filed: August 15, 2012
    Publication date: November 13, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura, Satoru Ogasahara
  • Publication number: 20140285765
    Abstract: A medical device includes a layer made of an acidic polymer and a basic polymer formed on at least a part of a surface of a water-containing base material, wherein at least one kind of an acidic polymer and a basic polymer forming the acidic polymer or the basic polymer is a polymer having a hydroxy group.
    Type: Application
    Filed: August 14, 2012
    Publication date: September 25, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20140240660
    Abstract: A medical device includes a layer made of an acidic polymer and a basic polymer formed on at least a part of a surface of a base material, wherein at least one kind of an acidic polymer and a basic polymer forming the layers made of the acidic polymer and the basic polymer is a multi-component copolymer of three or more components.
    Type: Application
    Filed: August 14, 2012
    Publication date: August 28, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20140198295
    Abstract: To provide a medical device which is excellent in wettability and lubricity and is also scarcely broken since it is soft, by a medical device in which a layer made of an acidic polymer and a basic polymer is formed on at least a part of a surface of a low water content soft base material, the low water content soft base material containing, as a main component, a copolymer containing a monofunctional monomer component M having one polymerizable functional group and one silicone moiety per molecule.
    Type: Application
    Filed: August 10, 2012
    Publication date: July 17, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Kazuhiko Fujisawa, Rumiko Kitagawa, Masataka Nakamura
  • Publication number: 20140198294
    Abstract: Disclosed is a medical device having an elastic modulus of 100 kPa or more and 2,000 kPa or less, a water content of 10% by mass or less, a tensile elongation of 50% or more and 3,000% or less, and a dynamic contact angle (advancing angle) relative to a borate buffer of 80° or less. The present invention can significantly reduce or avoid a phenomenon of adhesion to a surface when contacted with a surface outside or inside the body, which has hitherto been regarded as a problem in a conventional medical device.
    Type: Application
    Filed: August 10, 2012
    Publication date: July 17, 2014
    Applicant: Toray Industries, Inc.
    Inventors: Masataka Nakamura, Rumiko Kitagawa, Ryuta Tamiya
  • Publication number: 20130129661
    Abstract: A material for skin is provided including a silicone component-containing polymer obtained by polymerizing a silicone monomer having a carbon-carbon double bond, and a component selected from an antibacterial agent and an alcohol. Provided are a material for skin, which is transparent and has a moderate moisture content, and also has high oxygen permeability, and a method for producing the same.
    Type: Application
    Filed: March 1, 2011
    Publication date: May 23, 2013
    Applicant: Toray Industries, Inc.
    Inventors: Rumiko Kitagawa, Masataka Nakamura, Satoshi Kusuda