Patents by Inventor Kazuhiko Nakada

Kazuhiko Nakada 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: 20220244428
    Abstract: An ophthalmic medical device including a photochromic polymer having higher transparency under an inactive state through use of a photochromic monomer. An ophthalmic medical device according to one embodiment that includes a photochromic polymer obtained by polymerizing monomer components including a photochromic monomer and a lactam ring-containing monomer, wherein a content ratio of the lactam ring-containing monomer in the monomer components is from 10 wt % to 50 wt %. The ophthalmic medical device is typically a contact lens or an intraocular lens.
    Type: Application
    Filed: June 27, 2019
    Publication date: August 4, 2022
    Applicants: MENICON CO., LTD., TOKUYAMA CORPORATION
    Inventors: Tomomi TOMIDA, Kazuhiko NAKADA, Masaki BABA, Satomu NIIDA, Junji MOMODA, Masayuki MIYAZAKI, Junji TAKENAKA
  • Patent number: 8989178
    Abstract: In IP Multimedia Subsystem (IMS) IMS Control Channel Protocol (ICCP) is used between a user equipment (UE) and IMS Control Channel Function (ICCF) and Session Initiated Protocol (SIP) interface (between to ICCF, Call Session Control Function and Application Server) to support the indication of Circuit Switched (CS) access in header information. The indication can be used by an S-CSCF or AS for different purposes such as routing decision, charging, and presence info.
    Type: Grant
    Filed: November 26, 2012
    Date of Patent: March 24, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Kazuhiko Nakada, Ralf Keller, George Foti
  • Patent number: 8710157
    Abstract: According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility is provided. The present invention also relates to a contact lens gel material having excellent oxygen permeability and transparency. Particularly, the present invention relates to a contact lens material comprising a polycarbonate resin derived from a bisphenol compound (A), a polysiloxane-substituted bisphenol compound (B) and a compound forming a carbonic acid ester.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: April 29, 2014
    Assignees: Menicon Co., Ltd., Mitsubishi Gas Chemical Company, Inc., Shin-Etsu Chemical Co., Ltd.
    Inventors: Yasuhiko Suzuki, Kazuhiko Nakada, Tsuyoshi Watanabe, Takahiro Adachi, Mamoru Hagiwara, Masahiko Minemura
  • Patent number: 8662663
    Abstract: The present invention provides a hybrid soft contact lens including a central portion formed with a first hydrous soft material, and a peripheral portion formed with a second hydrous soft material, in which the first hydrous soft material is obtained by curing a first curable composition including a silicone-containing monomer. Preferably, the first hydrous soft material has a Young's modulus of no less than 3.0 MPa and no greater than 100 MPa, and the second hydrous soft material has a Young's modulus of no less than 0.20 MPa and less than 3.0 MPa.
    Type: Grant
    Filed: July 5, 2010
    Date of Patent: March 4, 2014
    Assignee: Menicon Co., Ltd.
    Inventors: Ryo Matsushita, Koji Otani, Kazuharu Niwa, Kazuhiko Nakada
  • Patent number: 8523878
    Abstract: A method of producing a medical instrument whereby a highly hydrophilic and lubricant coating layer having a high durability can be formed by a simple technique and thus highly hydrophilic and lubricant properties can be imparted to a surface of a medical instrument. An intraocular lens insertion instrument having been subjected to a surface treatment as described above is also provided. The method includes preparing a coating solution by mixing at least a water-insoluble polymer having carboxyl group and a polyfunctional reactive compound with an organic solvent; applying this solution on the surface of the medical instrument; conducting crosslinking; and performing a chemical reaction process. The coating layer is made hydrophilic. The intraocular lens insertion instrument is made hydrophilic by forming the coating layer as described above on an inner surface of an insertion tube portion, crosslinking and then performing the chemical reaction process.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: September 3, 2013
    Assignee: Kowa Company, Ltd.
    Inventors: Kohsuke Satake, Kazuharu Niwa, Ryo Matsushita, Yasuhiko Suzuki, Hiroko Nomura, Kazuhiko Nakada
  • Patent number: 8501878
    Abstract: According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility, as well as a contact lens gel material having excellent oxygen permeability and transparency can be provided. The present invention relates to a contact lens material comprising a polycarbonate resin derived from at least two compounds among compounds represented by a general formula (A), a general formula (B) and a general formula (C), a highly polar molecular weight control modifier (chain terminator) and a compound forming a carbonic acid ester, wherein the compound of the general formula (A) is essentially comprised, and to a production method thereof.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: August 6, 2013
    Assignees: Menicon Co., Ltd., Mitsubishi Gas Chemical Company, Inc., Shin-Etsu Chemical Co., Ltd.
    Inventors: Yasuhiko Suzuki, Kazuhiko Nakada, Tsuyoshi Watanabe, Takahiro Adachi, Mamoru Hagiwara, Masahiko Minemura
  • Patent number: 8340084
    Abstract: In IP Multimedia Subsystem (IMS) IMS Control Channel Protocol (ICCP) is used between a user equipment (UE) and IMS Control Channel Function (ICCF) and Session Initiated Protocol (SIP) interface (between to ICCF, Call Session Control Function and Application Server) to support the indication of Circuit Switched (CS) access utilizing P-Access-Network-Information header. The indication can be used by an S-CSCF or AS for different purposes such as routing decision, charging, and presence info.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: December 25, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Kazuhiko Nakada, Ralf Keller, George Foti
  • Publication number: 20120169994
    Abstract: The present invention provides a hybrid soft contact lens including a central portion formed with a first hydrous soft material, and a peripheral portion formed with a second hydrous soft material, in which the first hydrous soft material is obtained by curing a first curable composition including a silicone-containing monomer. Preferably, the first hydrous soft material has a Young's modulus of no less than 3.0 MPa and no greater than 100 MPa, and the second hydrous soft material has a Young's modulus of no less than 0.20 MPa and less than 3.0 MPa.
    Type: Application
    Filed: July 5, 2010
    Publication date: July 5, 2012
    Applicant: MENICON CO., LTD.
    Inventors: Ryo Matsushita, Koji Otani, Kazuharu Niwa, Kazuhiko Nakada
  • Publication number: 20120116028
    Abstract: According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility, as well as a contact lens gel material having excellent oxygen permeability and transparency can be provided. The present invention relates to a contact lens material comprising a polycarbonate resin derived from at least two compounds among compounds represented by a general formula (A), a general formula (B) and a general formula (C), a highly polar molecular weight control modifier (chain terminator) and a compound forming a carbonic acid ester, wherein the compound of the general formula (A) is essentially comprised, and to a production method thereof.
    Type: Application
    Filed: July 15, 2009
    Publication date: May 10, 2012
    Inventors: Yasuhiko Suzuki, Kazuhiko Nakada, Tsuyoshi Watanabe, Takahiro Adachi, Mamoru Hagiwara, Masahiko Minemura
  • Publication number: 20120116019
    Abstract: According to the present invention, a contact lens material being excellent in oxygen permeability and transparency, being capable of undergoing injection molding, having no water content and having flexibility is provided. The present invention also relates to a contact lens gel material having excellent oxygen permeability and transparency. Particularly, the present invention relates to a contact lens material comprising a polycarbonate resin derived from a compound represented by a general formula (A), a compound represented by a general formula (B) and a compound forming a carbonic acid ester.
    Type: Application
    Filed: July 15, 2009
    Publication date: May 10, 2012
    Inventors: Yasuhiko Suzuki, Kazuhiko Nakada, Tsuyoshi Watanabe, Takahiro Adachi, Mamoru Hagiwara, Masahiko Minemura
  • Patent number: 8173720
    Abstract: A transparent gel is disclosed which has an interpenetrating polymer network of a copolymer containing a polysiloxane structure and a polycarbonate structure and a hydrophilic polymer obtained by polymerizing a hydrophilic monomer. The transparent gel is useful as a cultivation substrate, a container for storage and an ophthalmic material, comprising an easily synthesizable and purifiable silicon-containing resin, wherein a gel strength, transparency, oxygen permeability, birefringence and other characteristics are excellent.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: May 8, 2012
    Assignees: Mitsubishi Gas Chemical Company, Inc., Menicon Co., Ltd.
    Inventors: Kazuhiko Nakada, Takahito Nakase, Takahiro Adachi, Akira Yamamoto, Masahiko Minemura
  • Publication number: 20100312255
    Abstract: A method of producing a medical instrument whereby a highly hydrophilic and lubricant coating layer having a high durability can be formed by a simple technique and thus highly hydrophilic and lubricant properties can be imparted to a surface of a medical instrument. An intraocular lens insertion instrument having been subjected to a surface treatment as described above is also provided. The method comprises the steps of: preparing a coating solution by mixing at least a water-insoluble polymer having carboxyl group and a polyfunctional reactive compound with an organic solvent; applying this solution on the surface of the medical instrument; conducting crosslinking; and performing a chemical reaction process whereby the coating layer is made hydrophilic. The intraocular lens insertion instrument is made hydrophilic by forming the coating layer as described above on an inner surface of an insertion tube portion, crosslinking and then performing the chemical reaction process.
    Type: Application
    Filed: December 17, 2008
    Publication date: December 9, 2010
    Applicant: MENICON CO., LTD.
    Inventors: Kohsuke Satake, Kazuharu Niwa, Ryo Matsushita, Yasuhiko Suzuki, Hiroko Nomura, Kazuhiko Nakada
  • Patent number: 7837327
    Abstract: It is an object to provide a novel system for supporting contact lens users, who has not been provided with an after-selling support sufficiently, which is able to provide an appropriate support to individual contact lens user so that he can use contact lenses with comfortable. In order to attain the object, an image signal of the user's currently used contact lenses (20) acquired by a user client apparatus (18) is transmitted via communication network means (38), to a server apparatus (12) of a supporting entity (10). The server apparatus (12) then obtains lens condition evaluation data, which are stored in memory means (14) and transmitted via the communication network means (38) to the user client apparatus (18) so that the user (16) can be provided with the lens condition evaluation data.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: November 23, 2010
    Assignee: Menicon Co., Ltd.
    Inventors: Hidenari Tanaka, Kazuhiko Nakada, Hiroaki Suzuki, Sadanori Ohno, Tetsuji Kawai
  • Publication number: 20100254372
    Abstract: A system and method of providing an enhanced service in a telecommunications network. The system includes a telecommunications network utilizing a circuit switched and packet switched access capability. The system also includes a sending User Equipment (UE) originating a call to a receiving UE. The sending UE sends an indicator informing the network to wait for further call information before proceeding with a call request towards the receiving UE. The system also includes a control node for routing calls within the network. The control node combines the call information received from the sending UE with call routing information of the call for connecting the call with the receiving UE to form a call request to the receiving UE. Upon receiving the call request message by the receiving UE, the call is connected and a media path is established between the receiving UE and the sending UE.
    Type: Application
    Filed: June 16, 2008
    Publication date: October 7, 2010
    Inventors: Ralf Keller, Jian Wang, Kazuhiko Nakada, Alf Heidermark
  • Publication number: 20100182998
    Abstract: A method and apparatus for managing access domain selection for a user device accessing an IP Multimedia Subsystem (IMS) network. A Call Session Control Function (CSCF) in the IMS network stores an access domain indicator associated with a user s contact address. The access domain indicator is associated with the user s contact address when the user registers with the IMS network. The CSCF sends the access domain indicator to an Access Domain Selection (ADS) function in the IMS network, the access domain indicator to be used by the ADS function in selecting an access domain. This allows the ADS function to select the correct access domain to use when sending messages to the user device.
    Type: Application
    Filed: June 13, 2008
    Publication date: July 22, 2010
    Inventors: Kazuhiko Nakada, Bo Aström, Alf Heidermark, Ralf Keller, Stephen Terrill
  • Publication number: 20100157985
    Abstract: In IP Multimedia Subsystem (IMS) IMS Control Channel Protocol (ICCP) is used between a user equipment (UE) and IMS Control Channel Function (ICCF) and Session Initiated Protocol (SIP) interface (between to ICCF, Call Session Control Function and Application Server) to support the indication of Circuit Switched (CS) access utilizing P-Access-Network-Information header. The indication can be used by an S-CSCF or AS for different purposes such as routing decision, charging, and presence info.
    Type: Application
    Filed: March 30, 2007
    Publication date: June 24, 2010
    Inventors: Kazuhiko Nakada, Ralf Keller, George Foti
  • Publication number: 20100118861
    Abstract: The present invention proposes a solution for providing packet-switched services to a user, even in case the user is accessibly only via a circuit-switched access. For this purpose it is proposed to force the user to report changes in the reachability status and to keep the user's registration alive in a packet-switched domain as long as the user is reachable. A packet-switched adapter located between the circuit-switched domain and a packet-switched domain aligns the registration status of the user in the packet-switched domain to the reachability status and performs a registration procedure depending on the outcome of the alignments. The registration procedure might be in detail either a registration or a re-registration or a de-registration procedure.
    Type: Application
    Filed: April 1, 2008
    Publication date: May 13, 2010
    Inventors: Andreas Witzel, Ralf Keller, Kazuhiko Nakada, Bo Aström
  • Patent number: 7560421
    Abstract: A method of disinfecting a contact lens is provided, including the steps of preparing a disinfecting liquid which contains hydrogen peroxide and at least one metal phthalocyanine compound dispersed or dissolved in an aqueous medium, immersing the contact lens in the disinfecting liquid, and irradiating the disinfecting liquid in which the contact lens is immersed with a light.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: July 14, 2009
    Assignee: Menicon Co., Ltd.
    Inventors: Kazuhiko Nakada, Kotaro Sakanishi
  • Publication number: 20090012205
    Abstract: A transparent gel is disclosed which has an interpenetrating polymer network of a copolymer containing a polysiloxane structure and a polycarbonate structure and a hydrophilic polymer obtained by polymerizing a hydrophilic monomer. The transparent gel is useful as a cultivation substrate, a container for storage and an ophthalmic material, comprising an easily synthesizable and purifiable silicon-containing resin, wherein a gel strength, transparency, oxygen permeability, birefringence and other characteristics are excellent.
    Type: Application
    Filed: January 13, 2006
    Publication date: January 8, 2009
    Inventors: Kazuhiko Nakada, Takahito Nakase, Takahiro Adachi, Akira Yamamoto, Masahiko Minemura
  • Patent number: 7364723
    Abstract: A highly safe liquid preparation for contact lenses which contains 0.3 to 50 ppm of a polyamine having recurring units of the formula (I): wherein n is 0 or 1, and which has a high antibacterial effect even at low concentrations.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: April 29, 2008
    Assignee: Menicon Co., Ltd.
    Inventors: Kazuhiko Nakada, Chikako Nakamura, Tatsuya Hayashi