Patents by Inventor Masaki Naritomi

Masaki Naritomi 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).

  • PLASTIC OPTICAL FIBER
    Publication number: 20120315478
    Abstract: A plastic optical fiber (POF) is provided which includes a core layer constructed such that a portion at least a certain distance away from a core center, as seen in cross section, contains a plurality of regions of polymer materials having different refractive indices, wherein the average refractive index per circumference continuously decreases with the increase in distance from the core center and wherein the refractive indices are discontinuously distributed on each whole circumference at each distance from the core center.
    Type: Application
    Filed: December 22, 2010
    Publication date: December 13, 2012
    Inventors: Masaki Naritomi, Hiroyoshi Inoue
  • Graded-refractive-index optical plastic material and method for its production
    Patent number: 6593415
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: July 15, 2003
    Inventors: Yasuhiro Koike, Masaki Naritomi
  • Graded-refractive-index optical plastic material and method for its production
    Patent number: 6590036
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: July 8, 2003
    Inventors: Yasuhiro Koike, Masaki Naritomi
  • Graded-refractive-index optical plastic material and method for its production
    Publication number: 20030069360
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
    Type: Application
    Filed: October 3, 2002
    Publication date: April 10, 2003
    Applicant: Yasuhiro KOIKE
    Inventors: Yasuhiro Koike, Masaki Naritomi
  • Plastic optical fiber and process for its production
    Publication number: 20030021577
    Abstract: A plastic optical fiber which comprises a core made of a non-crystalline fluoropolymer (a) having substantially no C—H bond, and a clad made of a fluoropolymer (b) having a refractive index lower by at least 0.001 than the fluoropolymer (a), and of which the propagation mode is a single mode.
    Type: Application
    Filed: July 18, 2002
    Publication date: January 30, 2003
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Norihide Sugiyama, Masaki Naritomi
  • Graded-refractive-index optical plastic material of a fluoropolymer containing a material in a concentration gradient therein
    Patent number: 6271312
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: August 7, 2001
    Assignee: Yasuhiro Koike
    Inventors: Yasuhiro Koike, Masaki Naritomi
  • Graded-refractive-index optical plastic material and method for its production
    Publication number: 20010004656
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
    Type: Application
    Filed: January 16, 2001
    Publication date: June 21, 2001
    Inventors: Yasuhiro Koike, Masaki Naritomi
  • Graded-refractive-index optical plastic material and method for its production
    Patent number: 5783636
    Abstract: A graded-refractive-index optical plastic material composed of an amorphous fluoropolymer and at least one material which differs from the polymer in refractive index by at least 0.001, wherein the material is so distributed as to have a concentration gradient in a specific direction, and a method for its production.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: July 21, 1998
    Assignee: Yasuhiro Koike
    Inventors: Yasuhiro Koike, Masaki Naritomi
  • 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
  • Fluorine-containing polymer composition
    Patent number: 5498657
    Abstract: A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: March 12, 1996
    Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.
    Inventors: Norihide Sugiyama, Atsushi Watakabe, Shunsuke Yokotsuka, Atsuo Hiroi, Masaki Naritomi, Naoko Shirota, Ko Aosaki, Masaru Nakamura
  • Fluorine-containing polymer composition
    Patent number: RE37022
    Abstract: A fluorine-containing polymer composition comprising a polymer having a functional group and a fluorine-containing aliphatic cyclic structure dissolved in a solvent mixture of an aprotic fluorine-containing solvent and a protic fluorine-containing solvent.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: January 16, 2001
    Assignees: Asahi Glass Company Ltd., Iwaki Glass Company Ltd.
    Inventors: Norihide Sugiyama, Atsushi Watakabe, Shunsuke Yokotsuka, Atsuo Hiroi, Masaki Naritomi, Naoko Shirota, Ko Aosaki, Masaru Nakamura