Patents by Inventor Masaya Iwaki
Masaya Iwaki 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).
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Patent number: 8268300Abstract: It is an object of the present invention to provide a polymer material, the histocompatibility of which has been improved by irradiation of ion beam, which prevents an aneurysm having a risk of rupture from actually rupturing. The present invention provides a material for treating aneurysms, which is composed of a polymer material containing carbon as a constitutional element, and which is produced by modifying at least a portion of the surface thereof by ion bombardment.Type: GrantFiled: February 10, 2011Date of Patent: September 18, 2012Assignees: RIKEN, The Chemo-Sero-Therapeutic Research InstituteInventors: Hiroshi Ujiie, Yoshiaki Suzuki, Masaya Iwaki, Takanori Uchida
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Publication number: 20110196415Abstract: It is an object of the present invention to provide a polymer material, the histocompatibility of which has been improved by irradiation of ion beam, which prevents an aneurysm having a risk of rupture from actually rupturing. The present invention provides a material for treating aneurysms, which is composed of a polymer material containing carbon as a constitutional element, and which is produced by modifying at least a portion of the surface thereof by ion bombardment.Type: ApplicationFiled: February 10, 2011Publication date: August 11, 2011Applicants: RIKEN, THE CHEMO-SERO-THERAPEUTIC RESEARCH INSTITUTEInventors: Hiroshi UJIIE, Yoshiaki SUZUKI, Masaya IWAKI, Takanori UCHIDA
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Patent number: 7722934Abstract: An object of the present invention is to provide a means for improving the affinity of an in vivo embedded material such as an artificial blood vessel or an artificial dura mater with a tissue adhesive, so as to quickly prevent the leakage of the blood or spinal fluid. The present invention provides a polymeric material used in combination with a tissue adhesive, which comprises carbon or silicon as a constitutional element, and at least a portion of the surface of which is modified by ion bombardment.Type: GrantFiled: August 29, 2003Date of Patent: May 25, 2010Assignee: RikenInventors: Yoshiaki Suzuki, Hiroshi Ujiie, Noriyoshi Takahashi, Masaya Iwaki
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Publication number: 20090212660Abstract: [Purpose] The present invention relates to an ultrasonic motor having a stator which includes a piezoelectric element for moving a rotor in a prescribed direction by applying a predetermined ultrasonic voltage thereto, and the rotor which is fixed to the stator by a frictional force, and a method for manufacturing an ultrasonic motor, and it has for its purpose to attain decrease of dust appearance by enhancement of a wear resistance, a different hardness, or the like in such a way that a contact part of at least either of a stator and a rotor which constitute the ultrasonic motor is irradiated with ions. [Constitution] An ultrasonic motor characterized in that either or both of contact parts of a stator and a rotor is/are irradiated with ions, thereby to enhance a wear resistance of the contact part or parts.Type: ApplicationFiled: April 20, 2006Publication date: August 27, 2009Applicants: Holon Co., Ltd, Riken, Kyocera Co. LtdInventors: Masaya Iwaki, Tomoko Iwaki, Koji Akashi, Norimichi Anazawa, Ken-ichi Kobayashi
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Publication number: 20070185570Abstract: It is an object of the present invention to provide a polymer material, the histocompatibility of which has been improved by irradiation of ion beam, which prevents an aneurysm having a risk of rupture from actually rupturing. The present invention provides a material for treating aneurysms, which is composed of a polymer material containing carbon as a constitutional element, and which is produced by modifying at least a portion of the surface thereof by ion bombardment.Type: ApplicationFiled: August 18, 2004Publication date: August 9, 2007Applicant: THE CHEMO-SERO-THERAPEUTIC RESEARCH INSTITUTEInventors: Hiroshi Ujiie, Yoshiaki Suzuki, Masaya Iwaki, Takanori Uchida
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Publication number: 20060155041Abstract: An object of the present invention is to provide a means for improving the affinity of an in vivo embedded material such as an artificial blood vessel or an artificial dura mater with a tissue adhesive, so as to quickly prevent the leakage of the blood or spinal fluid. The present invention provides a polymeric material used in combination with a tissue adhesive, which comprises carbon or silicon as a constitutional element, and at least a portion of the surface of which is modified by ion bombardment.Type: ApplicationFiled: August 29, 2003Publication date: July 13, 2006Inventors: Yoshiaki Suzuki, Hiroshi Ujie, Noriyoshi Takahashi, Masaya Iwaki
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Publication number: 20060084131Abstract: A method for obtaining information on the primary structure of peptides comprising fragmenting the proteins, which enables automation of obtaining information on the primary structure of a peptide sample; a device for use in the method; and an automatic analysis system on the primary structure of the peptides. The method for obtaining information on the primary structure of peptides comprising the steps of: denaturing, reducing, and alkylating a protein; immobilizing the reduced alkylated protein obtained on a hydrophobic microparticulate carrier; chemically or enzymatically fragmenting the immobilized protein obtained; and obtaining information on the primary structure of the peptides fragmented.Type: ApplicationFiled: September 29, 2005Publication date: April 20, 2006Applicant: RIKENInventors: Hiroshi Nakayama, Hiromi Miura, Masaya Iwaki
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Patent number: 6984823Abstract: There are provided an electron microscope capable of carrying out focusing and astigmatism correction without depending on characteristics of a sample, and a method for controlling its focus position.Type: GrantFiled: June 10, 2002Date of Patent: January 10, 2006Assignee: RikenInventors: Masaya Iwaki, Norio Baba
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Patent number: 6872759Abstract: The present invention provides a material having adhesiveness to bone and/or fascia, which is composed of a polymeric material comprising carbon as a constituent element, and at least a part of a surface of which is modified by ion bombardment. The material of the present invention is applicable as a prosthesis in surgery of spinal diseases and as a prosthesis in surgery on thoracic organs and abdominal organs or musculoskeleton in addition to the application thereof to the artificial dura mater.Type: GrantFiled: April 16, 2002Date of Patent: March 29, 2005Assignee: RikenInventors: Yoshiaki Suzuki, Masaya Iwaki, Makoto Kaibara, Masami Kamio
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Publication number: 20040174588Abstract: There are provided an electron microscope capable of carrying out focusing and astigmatism correction without depending on characteristics of a sample, and a method for controlling its focus position.Type: ApplicationFiled: December 12, 2003Publication date: September 9, 2004Inventors: Masaya Iwaki, Norio Baba
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Patent number: 6709491Abstract: The object of the present invention is to provide a novel gas separation membrane having a high gas permeability and a high gas selectivity, and a method of producing the same. The present invention provides a gas separation membrane comprising a polymeric material soluble in an organic solvent, wherein at least a part of the surface is modified by ion bombardment.Type: GrantFiled: August 26, 2002Date of Patent: March 23, 2004Assignee: RikenInventors: Hiroyoshi Kawakami, Shoji Nagaoka, Yoshiaki Suzuki, Masaya Iwaki
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Publication number: 20030089235Abstract: The object of the present invention is to provide a novel gas separation membrane having a high gas permeability and a high gas selectivity, and a method of producing the same. The present invention provides a gas separation membrane comprising a polymeric material soluble in an organic solvent, wherein at least a part of the surface is modified by ion bombardment.Type: ApplicationFiled: August 26, 2002Publication date: May 15, 2003Applicant: RIKENInventors: Hiroyoshi Kawakami, Shoji Nagaoka, Yoshiaki Suzuki, Masaya Iwaki
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Publication number: 20020155295Abstract: The present invention provides a material having adhesiveness to bone and/or fascia, which is composed of a polymeric material comprising carbon as a constituent element, and at least a part of a surface of which is modified by ion bombardment. The material of the present invention is applicable as a prosthesis in surgery of spinal diseases and as a prosthesis in surgery on thoracic organs and abdominal organs or musculoskeleton in addition to the application thereof to the artificial dura mater.Type: ApplicationFiled: April 16, 2002Publication date: October 24, 2002Applicant: RIKENInventors: Yoshiaki Suzuki, Masaya Iwaki, Makoto Kaibara, Masami Kamio
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Patent number: 5906824Abstract: An antithrombogenic material whose stickiness to cells is maintained but whose stickiness to blood platelet is inhibited, is disclosed, which comprises a substrate and a biopolymer material coated on said substrate, the antithrombogenic material being obtained by irradiating the biopolymer material with ion beam to maintain its stickiness to a cell but reduce its stickiness to a blood platelet. In accordance with the present invention, there is also provided a method for producing the antithrombogenic material.Type: GrantFiled: May 15, 1997Date of Patent: May 25, 1999Assignees: Sony Corporation, The Institute of Physical and Chemical ResearchInventors: Yoshiaki Suzuki, Aiko Nakao, Masaya Iwaki, Masahiro Kusakabe, Hiroshi Nakajima, Sanzo Kaneko, Hiroyuki Honda
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Patent number: 5891192Abstract: Ion-implanted protein-coated occlusion coils are described which have essentially the same dimensions as untreated coils and exhibit altered surface properties, e.g., thrombogenicity, endothelial cellular migration and adhesion, relative to untreated coils thus making them particularly useful in treating wide-necked brain aneurysms.Type: GrantFiled: May 22, 1997Date of Patent: April 6, 1999Assignee: The Regents of the University of CaliforniaInventors: Yuichi Murayama, Fernando Vinuela, Yoshiaki Suzuki, Masaya Iwaki
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Patent number: 5308704Abstract: A cell adhesive material with excellent cell adhesion and cell proliferating property and a method for producing the same are provided. The adhesion and proliferation of cells can be improved remarkably by the surface modification of a cell adhesive material comprising a polymer material containing carbon as a constituting element, such as polystyrene or segmented polyurethane, wherein at least a part of the surface is modified by ion bombardment through ion implantation. The method for producing such cell adhesive material comprises implanting ions into at least a part of the surface of the polymer material. The cell adhesive material and the method for producing the same are promising for application to cell culture petri dishes and hybrid-type medicinal materials.Type: GrantFiled: August 19, 1992Date of Patent: May 3, 1994Assignees: Sony Corporation, Rikagaku KenkyusyoInventors: Yoshiaki Suzuki, Masahiro Kusakabe, Jae-Suk Lee, Makoto Kaibara, Masaya Iwaki, Hiroyuki Sasabe
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Patent number: 4698233Abstract: Process for producing an aluminum material having an aluminum nitride surface layer which comprises implanting the surface of an aluminum substrate with nitrogen ions while maintaining a nitrogen atmosphere under reduced pressure in the vicinity of the surface of the aluminum substrate. The aluminum nitride modified layer contains substantially no impurities such as oxygen. It is a feature of this invention to perform ion implantation in a properly controlled nitrogen atmosphere at a proper degree of vacuum in the range of about 10.sup.-7 to 10.sup.-5 Torr.Type: GrantFiled: June 10, 1986Date of Patent: October 6, 1987Assignees: Nippon Light Metal Company Limited, Rikagaku KenkyushoInventors: Shigeo Ohira, Masaya Iwaki