Patents by Inventor Hidenobu Murofushi

Hidenobu Murofushi 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).

  • Optical fiber having sea and islands structure
    Publication number: 20050141834
    Abstract: To provide a low attenuation and high bandwidth type optical transmission article. An optical fiber having a sea and islands structure in which a dispersed phase as a low refractive index component is dispersed in a continuous phase as a high refractive index component.
    Type: Application
    Filed: February 28, 2005
    Publication date: June 30, 2005
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventor: Hidenobu Murofushi
  • Process for producing a fluorine-containing compound by liquid phase fluorination
    Publication number: 20050020855
    Abstract: The invention provides a process for producing a fluorine-containing compound from an inexpensive material. Namely, Compound I such as RACH2OH is reacted with Compound II such as XCORB to form Compound III such as RACH2OCORB, followed by fluorination in a liquid phase to form Compound IV such as RAFCF2OCORBF, which is converted to Compound V such as RAFCOF and/or Compound VI such as RBFCOF. RA is an alkyl group or the like, RB is a perhalogenoalkyl group or the like, RAF and RBF are fluorinated RA and RB, and X is halogen.
    Type: Application
    Filed: August 11, 2004
    Publication date: January 27, 2005
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Hidenobu Murofushi
  • Device and process for refining solid material
    Publication number: 20040134419
    Abstract: To provide a device for refining a solid material and a process for refining it, whereby from the supply of the material to the operation for recovery of crystals can be carried out batch-wisely or continuously, and inclusion of foreign matters such as particles can be efficiently prevented. A device for refining an evaporable or sublimable solid material, which comprises a housing, and at least one rotatable roller for evaporation and at least one rotatable roller for precipitation, installed in the housing.
    Type: Application
    Filed: January 5, 2004
    Publication date: July 15, 2004
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Kazunori Chiba, Hidenobu Murofushi
  • Fluorine-containing diene, its production method and its polymer
    Patent number: 6670511
    Abstract: A fluorine-containing diene represented by the formula 1: CF2═CF(CF2)nCXYOCF═CF2  Formula 1 wherein each of X and Y which are independent of each other, is an atom selected from a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, provided that X and Y are not simultaneously hydrogen atoms or fluorine atoms, and n is an integer of from 1 to 3.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: December 30, 2003
    Assignee: Asahi Glass Company Limited
    Inventors: Kimiaki Kashiwagi, Hidenobu Murofushi, Norihide Sugiyama, Masakuni Sato, Atsushi Watakabe
  • Process for producing a fluorine-containing compound by liquid phase fluorination
    Publication number: 20030204099
    Abstract: The invention provides a process for producing a fluorine-containing compound from an inexpensive material.
    Type: Application
    Filed: April 24, 2003
    Publication date: October 30, 2003
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Hidenobu Murofushi
  • Method for preparing unsaturated compound by pyrolysis reaction
    Publication number: 20030139570
    Abstract: The present invention produces an unsaturated compound (Formula 2) useful as a fluororesin starting material and the like by using a compound of the Formula 1 as a starting material.
    Type: Application
    Filed: December 2, 2002
    Publication date: July 24, 2003
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Masakuni Sato, Hidenobu Murofushi, Koichi Yanase, Yasuhiro Suzuki
  • Process for producing a fluorine-containing compound by liquid phase fluorination
    Patent number: 6586626
    Abstract: The invention provides a process for producing a fluorine-containing compound from an inexpensive material. Namely, Compound I such as RACH2OH is reacted with Compound II such as XCORB to form Compound III such as RACH2OCORB, followed by fluorination in a liquid phase to form Compound IV such as RAFCF2OCORBF, which is converted to Compound V such as RAFCOF and/or Compound VI such as RBFCOF. RA is an alkyl group or the like, RB is a perhalogenoalkyl group or the like, RAF and RBF are fluorinated RA and RB, and X is halogen.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: July 1, 2003
    Assignee: Asahi Glass Company, Limited
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Hidenobu Murofushi
  • Fluorine-containing diene, its production method and its polymer
    Publication number: 20020156329
    Abstract: A fluorine-containing diene represented by the formula 1:
    Type: Application
    Filed: May 15, 2002
    Publication date: October 24, 2002
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kimiaki Kashiwagi, Hidenobu Murofushi, Norihide Sugiyama, Masakuni Sato, Atsushi Watakabe
  • Fluorine-containing diene, its production method and its polymer
    Patent number: 6448452
    Abstract: A polymer which contains monomer units formed by polymerization of a fluorine-containing diene of formula 1: CF2═CF(CF2)nCXYOCF═CF2 Wherein X and Y are hydrogen and chlorine, hydrogen and-bromine, hydrogen and iodine, fluorine and chlorine, fluorine and bromine, fluorine and iodine, chlorine and bromine, chlorine and iodine, bromine and bromine, bromine and iodine, or iodine and iodine and n is an integer from 1 to 3.
    Type: Grant
    Filed: April 25, 2001
    Date of Patent: September 10, 2002
    Assignee: Asahi Glass Company Limited
    Inventors: Kimiaki Kashiwagi, Hidenobu Murofushi, Norihide Sugiyama, Masakuni Sato, Atsushi Watakabe
  • Process for producing a fluorine containing compound by liquid phase fluorination
    Publication number: 20020022752
    Abstract: The invention provides a process for producing a fluorine-containing compound from an inexpensive material.
    Type: Application
    Filed: September 24, 2001
    Publication date: February 21, 2002
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Hidenobu Murofushi
  • Fluorine-containing diene, its production method and its polymer
    Publication number: 20010047115
    Abstract: A fluorine-containing diene represented by the formula 1:
    Type: Application
    Filed: April 25, 2001
    Publication date: November 29, 2001
    Applicant: Asahi Glass Company, Limited
    Inventors: Kimiaki Kashiwagi, Hidenobu Murofushi, Norihide Sugiyama, Masakuni Sato, Atsushi Watakabe
  • Graded-refractive-index optical plastic material and method for its production
    Patent number: 6166125
    Abstract: A graded-refractive-index optical plastic material comprising an amorphous fluorine-containing polymer (A) having substantially no C--H bond, and at least one fluorine-containing polycyclic compound (B) having a refractive index higher by at least 0.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: December 26, 2000
    Assignee: Asahi Glass Company Ltd.
    Inventors: Norihide Sugiyama, Hidenobu Murofushi, Takashi Okazoe, Masayuki Tamura, Shin Tatematsu, Jun Irisawa
  • Graded-refractive-index optical plastic material and method for its production
    Patent number: 5916971
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which has substantially no C--H bond and at least one material (b) which has substantially no C--H bond and differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction, and the optical plastic material has a glass transition temperature which is substantially uniform throughout it.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: June 29, 1999
    Assignee: Yasuhiro Koike
    Inventors: Yasuhiro Koike, Hidenobu Murofushi, Norihide Sugiyama
  • Graded-refractive-index optical plastic material and method for its production
    Patent number: 5760139
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer (a) which substantially has no C-H bond and at least one material (b) which differs from the fluoropolymer (a) in refractive index by at least 0.001, wherein the material (b) is distributed in the fluoropolymer (a) so as to have a concentration gradient in a specific direction.
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: June 2, 1998
    Assignee: Yasuhiro Koike
    Inventors: Yasuhiro Koike, Masaki Naritomi, Hidenobu Murofushi, Norihide Sugiyama