Patents by Inventor Yoshinobu Kanemura

Yoshinobu Kanemura 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: 6770734
    Abstract: A polymerizable composition for a lens with a high refractive index comprising at least one polythiol compound represented general formula (1): R—(SH2SH)n  (1) where R is an organic residue except an aromatic group and n is an integer of at least 1, having at least two intramolecular mercapto groups and at least one compound having an intramolecular functional group which can react with a mercapto group; a resin prepared by polymerizing the composition; an optical element and a lens made of the resin; and a process for preparing a thiol compound comprising the steps of reacting a compound represented by general formula (2): HS—R1(—S—R2)m  (2) where m is an integer of at least 1; R1 represents an aromatic, aliphatic, alicyclic or heterocyclic organic residue or aliphatic, alicyclic or heterocyclic organic residue with an aromatic ring or a sulfur atom in its chain; and R2 represents a protective group, with a compound having a functional group which can react wit
    Type: Grant
    Filed: December 11, 2002
    Date of Patent: August 3, 2004
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi, Yoshinobu Kanemura
  • Patent number: 6770735
    Abstract: This invention provides a polymerizable composition for a lens with a high refractive index comprising at least one polythiol compound represented general formula (1): R—(SCH2SH)n  (1) where R is an organic residue except an aromatic group and n is an integer of at least 1, having at least two intramolecular mercapto groups and at least one compound having an intramolecular functional group which can react with a mercapto group; a resin prepared by polymerizing the composition; an optical element and a lens made of the resin; and a process for preparing a thiol compound comprising the steps of reacting a compound represented by general formula (2): HS—R1(—S—R2)m  (2) where m is an integer of at least 1; R1 represents an aromatic, aliphatic, alicyclic or heterocyclic organic residue or aliphatic, alicyclic or heterocyclic organic residue with an aromatic ring or a sulfur atom in its chain; and R2 represents a protective group, with a compound having a functiona
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: August 3, 2004
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi, Yoshinobu Kanemura
  • Patent number: 6664364
    Abstract: There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) and (4) which are useful for the transparent optical material and the plastic lens: wherein symbols are as defined in the specification.
    Type: Grant
    Filed: September 19, 2002
    Date of Patent: December 16, 2003
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Yoshinobu Kanemura, Masahiko Kusumoto
  • Publication number: 20030199668
    Abstract: This invention provides a polymerizable composition for a lens with a high refractive index comprising at least one polythiol compound represented general formula (1):
    Type: Application
    Filed: June 6, 2003
    Publication date: October 23, 2003
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi, Yoshinobu Kanemura
  • Publication number: 20030166830
    Abstract: There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them.
    Type: Application
    Filed: September 19, 2002
    Publication date: September 4, 2003
    Inventors: Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Yoshinobu Kanemura, Masahiko Kusumoto
  • Publication number: 20030149230
    Abstract: A polymerizable composition for a lens with a high refractive index comprising at least one polythiol compound represented general formula (1):
    Type: Application
    Filed: December 11, 2002
    Publication date: August 7, 2003
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi, Yoshinobu Kanemura
  • Patent number: 6596841
    Abstract: This invention provides a polymerizable composition for a lens with a high refractive index comprising at least one polythiol compound represented general formula (1): R—(SH2SH)n  (1) where R is an organic residue except an aromatic group and n is an integer of at least 1, having at least two intramolecular mercapto groups and at least one compound having an intramolecular functional group which can react with a mercapto group; a resin prepared by polymerizing the composition; an optical element and a lens made of the resin; and a process for preparing a thiol compound comprising the steps of reacting a compound represented by general formula (2): HS—R1(—S—R2)m  (2) where m is an integer of at least 1; R1 represents an aromatic, aliphatic, alicyclic or heterocyclic organic residue or aliphatic, alicyclic or heterocyclic organic residue with an aromatic ring or a sulfur atom in its chain; and R2 represents a protective group, with a compound having a functional g
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: July 22, 2003
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi, Yoshinobu Kanemura
  • Patent number: 6482918
    Abstract: There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) and (4) which are useful for the transparent optical material and the plastic lens: wherein symbols are as defined in the specification.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: November 19, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Yoshinobu Kanemura, Masahiko Kusumoto
  • Patent number: 6458917
    Abstract: An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above polymerizable composition to which is added primary and/or secondary amines as an yellowing inhibitor in a proportion of 0.001 to 0.5 of the total molar number of NH2 and NH groups in the amines to the total molar number of thioepoxy and epoxy groups in the (thio)epoxy compound having at least one intramolecular disulfide bond, can provide a transparent resin in which yellowing and reduction in heat resistance associated therewith are adequately prevented while maintaining a high refractive index.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: October 1, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu, Yoshinobu Kanemura
  • Publication number: 20020120097
    Abstract: There are herein disclosed a transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them.
    Type: Application
    Filed: August 23, 2001
    Publication date: August 29, 2002
    Inventors: Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Yoshinobu Kanemura, Masahiko Kusumoto
  • Patent number: 6365707
    Abstract: A polymerizable composition according to the present invention is characterized by that it comprises a compound (a) having at least one structure represented by the following formula (1): wherein R1 is a divalent hydrocarbon group having 1 to 10 carbon atoms, R2, R3 and R4 each independently represents a hydrocarbon group having 1 to 10 carbon atoms or a hydrogen atom; X stands for an S or O atom and the average number of S atom is at least 50% based on the total number of S and O atoms which consist of the three membered ring; and X′ is —S— or —O—, at least two compounds (b) having a tertiary amino group substituted with aliphatic and/or aromatic group(s), which are each different in catalytic activity as a polymerization catalyst, with the proviso that the ratio of the total of the tertiary amino groups in the at least two compounds (b) to the episulfide groups in compound (a) is in the range of 0.0001 to 0.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: April 2, 2002
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Akinori Ryu, Seiichi Kobayashi, Hiroyuki Morijiri, Chitoshi Shimakawa, Koju Okazaki, Yoshinobu Kanemura, Nobuo Kawato
  • Publication number: 20020022713
    Abstract: This invention provides a polymerizable composition for a lens with a high refractive index comprising at least one polythiol compound represented general formula (1):
    Type: Application
    Filed: March 27, 2001
    Publication date: February 21, 2002
    Inventors: Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi, Yoshinobu Kanemura
  • Publication number: 20020019511
    Abstract: An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above polymerizable composition to which is added primary and/or secondary amines as an yellowing inhibitor in a proportion of 0.001 to 0.5 of the total molar number of NH2 and NH groups in the amines to the total molar number of thioepoxy and epoxy groups in the (thio)epoxy compound having at least one intramolecular disulfide bond, can provide a transparent resin in which yellowing and reduction in heat resistance associated therewith are adequately prevented while maintaining a high refractive index.
    Type: Application
    Filed: August 1, 2001
    Publication date: February 14, 2002
    Inventors: Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu, Yoshinobu Kanemura
  • Patent number: 6303747
    Abstract: A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) and (4) which are useful for the transparent optical material and the plastic lens: wherein symbols are as defined in the specification.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: October 16, 2001
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Yoshinobu Kanemura, Masahiko Kusumoto
  • Patent number: 6300464
    Abstract: An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above polymerizable composition to which is added primary and/or secondary amines as an yellowing inhibitor in a proportion of 0.001 to 0.5 of the total molar number of NH2 and NH groups in the amines to the total molar number of thioepoxy and epoxy groups in the (thio)epoxy compound having at least one intramolecular disulfide bond, can provide a transparent resin in which yellowing and reduction in heat resistance associated therewith are adequately prevented while maintaining a high refractive index.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: October 9, 2001
    Assignee: Mitsui Chemical, Inc.
    Inventors: Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu, Yoshinobu Kanemura
  • Publication number: 20010002413
    Abstract: An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above polymerizable composition to which is added primary and/or secondary amines as an yellowing inhibitor in a proportion of 0.001 to 0.5 of the total molar number of NH2 and NH groups in the amines to the total molar number of thioepoxy and epoxy groups in the (thio)epoxy compound having at least one intramolecular disulfide bond, can provide a transparent resin in which yellowing and reduction in heat resistance associated therewith are adequately prevented while maintaining a high refractive index.
    Type: Application
    Filed: December 26, 2000
    Publication date: May 31, 2001
    Inventors: Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu, Yoshinobu Kanemura
  • Patent number: 6204311
    Abstract: An optical resin prepared by curing a polymerizable composition comprising a (thio)epoxy compound having at least one intramolecular disulfide bond exhibits a considerably high refractive index while maintaining good optical properties and a high Abbe number. In addition, the above polymerizable composition to which is added primary and/or secondary amines as an yellowing inhibitor in a proportion of 0.001 to 0.5 of the total molar number of NH2 and NH groups in the amines to the total molar number of thioepoxy and epoxy groups in the (thio)epoxy compound having at least one intramolecular disulfide bond, can provide a transparent resin in which yellowing and reduction in heat resistance associated therewith are adequately prevented while maintaining a high refractive index.
    Type: Grant
    Filed: March 8, 1999
    Date of Patent: March 20, 2001
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu, Yoshinobu Kanemura
  • Patent number: 6124424
    Abstract: A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) and (4) which are useful for the transparent optical material and the plastic lens: ##STR1## wherein symbols are as defined in the specification.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: September 26, 2000
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Yoshinobu Kanemura, Masahiko Kusumoto
  • Patent number: 6100362
    Abstract: A polythiol having four or more functional groups, a process for producing the polythiol comprising reacting thiourea with a specific compound, a sulfur-containing urethane-based resin prepared from the polythiol and a lens made of the resin. The resin has a high refractive index, and low dispersion of refractive index, is lightweight, colorless and transparent, has no optical distortion, and has excellent characteristics in weatherability, dye-affinity, heat resistance, impact resistance and machinability.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: August 8, 2000
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Koju Okazaki, Yoshinobu Kanemura, Teruyuki Nagata
  • Patent number: 5973168
    Abstract: A process for preparing a phthalide compound represented by the formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are individually an alkyl group, and R.sup.1 and R.sup.2, R.sup.3 and R.sup.4, and R.sup.5 and R.sup.6 can respectively bond to each other to form a heterocyclic ring together with a nitrogen atom, comprising oxidizing a triphenylmethane compound represented by the formula (2) ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are the same as above, is oxidized in the presence of activated carbon in an aqueous solvent by an oxidizing agent.The process can provide a fast reaction that produces a high purity product with high yield.
    Type: Grant
    Filed: June 15, 1998
    Date of Patent: October 26, 1999
    Assignees: Mitsui Chemicals, Inc., Yamamoto Chemicals
    Inventors: Takeshi Nishimura, Masaru Wada, Yoshinobu Kanemura, Satoshi Nakao, Mansuke Matsumoto