Patents by Inventor Akio Shirasu

Akio Shirasu 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: 20160121031
    Abstract: An adhesion preventive kit and a method of preventing adhesion are provided which have a preventive effect on adhesion in a surrounding part of an edge of an injured or deficient tissue in guided regeneration therapy for an injured tissue. Specifically, the adhesion preventive kit includes: (A) a first membrane of at least two layers having a biodegradable base layer and an adhesion preventive layer provided respectively at outermost surfaces thereof and a second membrane of at least one layer having an adhesion preventive layer provided at an outermost surface thereof; or (B) an adhesion preventive membrane including a biodegradable base layer and an adhesion preventive layer, which membrane has an outermost surface constituted of the adhesion preventive layer and has a tissue sandwiching part.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 5, 2016
    Inventors: Yukihiro Morinaga, Ryosuke Kamimura, Kazuhisa Matsuda, Akio Shirasu
  • Patent number: 9050403
    Abstract: Provided is a platelet-rich plasma separator which can carry out the separation of a platelet-rich plasma with a small number of gamma radiation sterilized instruments and a platelet-rich plasma separation method. The platelet-rich plasma separator comprises a first syringe and a second syringe. The first syringe comprises a first syringe cylinder provided with a first port on which a blood collection needle can be mounted, a first cap detachable from the first port, a first gasket for sealing the first syringe cylinder fluid-tightly, which first gasket is reciprocated within the first syringe cylinder, and a first plunger provided detachably on the first gasket.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: June 9, 2015
    Assignee: NIPRO CORPORATION
    Inventors: Shinji Morimoto, Norihisa Sasayama, Akio Shirasu
  • Patent number: 8375688
    Abstract: A package for a cryopreservation container including at least an adhesive fluoropolymer film. The package for a cryopreservation container makes it possible to store blood, rare cells and vital tissues in a very low temperature environment without any damage to the container. Further, the sealing strength resulting from heat sealing after placing a cryopreservation container in the packages is very good. Therefore, liquid nitrogen can be inhibited from entering the inside and thus contamination with bacteria, viruses or the like contained in liquid nitrogen can be avoided and the package can be prevented from being broken by expansion of intruder liquid nitrogen on the occasion of thawing. Also disclosed is a method for packaging a cryopreservation container and a method of producing a package for a cryopreservation container.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: February 19, 2013
    Assignees: Nipro Corporation, Daikin Industries, Ltd.
    Inventors: Kazuki Ishihara, Hideaki Murahashi, Naomi Nakatani, Yoshihiro Yoshikawa, Akio Shirasu, Hidenori Ozaki
  • Publication number: 20110252748
    Abstract: A package for a cryopreservation container including at least an adhesive fluoropolymer film. The package for a cryopreservation container makes it possible to store blood, rare cells and vital tissues in a very low temperature environment without any damage to the container. Further, the sealing strength resulting from heat sealing after placing a cryopreservation container in the packages is very good. Therefore, liquid nitrogen can be inhibited from entering the inside and thus contamination with bacteria, viruses or the like contained in liquid nitrogen can be avoided and the package can be prevented from being broken by expansion of intruder liquid nitrogen on the occasion of thawing. Also disclosed is a method for packaging a cryopreservation container and a method of producing a package for a cryopreservation container.
    Type: Application
    Filed: June 23, 2011
    Publication date: October 20, 2011
    Applicants: DAIKIN INDUSTRIES, LTD., NIPRO CORPORATION
    Inventors: Kazuki ISHIHARA, Hideaki MURAHASHI, Naomi NAKATANI, Yoshihiro YOSHIKAWA, Akio SHIRASU, Hidenori OZAKI
  • Publication number: 20100055773
    Abstract: Under a state where the zipper 22 of a culture bag is opened, an operator depresses the opening button 43 of an arm 40 with one finger. Consequently, a force for oscillating the arm 40 to separate a retaining portion 49 upward from the culture surface 32 around a pin 42 acts against the urging force of a leaf spring 50. Consequently, the tip 52a of an extended portion 52 ascends to a predetermined position while resisting against the urging force of the leaf spring 50. Since the lower surface 20a of the culture bag 20 is retained by a base 31 and the upper surface 20b is raised upward by the tip 52a of an extended portion 52, opening 24 of the culture bag 20 is widened. Since the width of the base 31 is larger than that of the arm 40, upper space of the culture surface 32 is not occupied by the arm 40 and a sufficiently wide work space is provided in the culture bag 20.
    Type: Application
    Filed: November 16, 2007
    Publication date: March 4, 2010
    Applicants: JAPAN TISSUE ENGINEERING CO., LTD., NIPRO CORPORATION
    Inventors: Kazuto Yamada, Naohito Iwata, Masakazu Kato, Ken-ichiro Hata, Akio Shirasu, Yoshihiro Yoshikawa, Atsushi Taguchi
  • Publication number: 20100025342
    Abstract: Provided is a platelet-rich plasma separator which can carry out the separation of a platelet-rich plasma with a small number of gamma radiation sterilized instruments and a platelet-rich plasma separation method. The platelet-rich plasma separator comprises a first syringe and a second syringe. The first syringe comprises a first syringe cylinder provided with a first port on which a blood collection needle can be mounted, a first cap detachable from the first port, a first gasket for sealing the first syringe cylinder fluid-tightly, which first gasket is reciprocated within the first syringe cylinder, and a first plunger provided detachably on the first gasket.
    Type: Application
    Filed: April 2, 2009
    Publication date: February 4, 2010
    Applicant: Nipro Corporation
    Inventors: Shinji Morimoto, Norihisa Sasayama, Akio Shirasu
  • Publication number: 20080241203
    Abstract: An adhesion preventive kit and a method of preventing adhesion are provided which have a preventive effect on adhesion in a surrounding part of an edge of an injured or deficient tissue in guided regeneration therapy for an injured tissue. Specifically, the adhesion preventive kit includes: (A) a first membrane of at least two layers having a biodegradable base layer and an adhesion preventive layer provided respectively at outermost surfaces thereof and a second membrane of at least one layer having an adhesion preventive layer provided at an outermost surface thereof, or (B) an adhesion preventive membrane including a biodegradable base layer and an adhesion preventive layer, which membrane has an outermost surface constituted of the adhesion preventive layer and has a tissue sandwiching part.
    Type: Application
    Filed: March 31, 2005
    Publication date: October 2, 2008
    Applicant: Nipro Corporation
    Inventors: Yukihiro Morinaga, Ryosuke Kamimura, Kazuhisa Matsuda, Akio Shirasu
  • Publication number: 20080082060
    Abstract: The present invention relates to a cord blood correcting device characterized by including: a branch indwelling needle having an outer cylinder needle provided on a distal end side, an inner needle drawing tube portion provided on a proximal end side, an inner needle provided inside the inner needle drawing tube portion, and a liquid outflow tube portion which branches off from the inner needle drawing tube portion; a cord tissue holder having a base portion and a holding portion for holding the cord tissue; and connecting means for interconnecting the branch indwelling needle and the cord tissue holder, and in that the connecting means has a structure for changing an angle between a puncture direction from the proximal end side to the distal end side of the branch indwelling needle and a holding direction from the base portion to the holding portion of the cord tissue holder.
    Type: Application
    Filed: September 27, 2007
    Publication date: April 3, 2008
    Inventors: Hajime Ogata, Hideaki Murahashi, Kazuyuki Takeda, Akio Shirasu, Yoshihiro Yoshikawa
  • Publication number: 20050153438
    Abstract: A vessel for cell culture includes a molded polymer sheet made of a polymer constituted by carbon atoms and hydrogen atoms attached to the carbon atoms, in which a part of the hydrogen atoms are substituted by fluorine atoms. The vessel has more excellent cell growth ability than conventional vessels for cell culture, and hence enables more efficient cell culture.
    Type: Application
    Filed: January 6, 2005
    Publication date: July 14, 2005
    Inventors: Akio Shirasu, Yoshihiro Yoshikawa, Seiichi Wada, Naomi Nakatani
  • Publication number: 20050129887
    Abstract: A medical freezer bag having a sufficient strength, which is not damaged at ?196° C., the temperature of liquid nitrogen, and is excellent in low temperature resistance and molding processability, and whole blood, body fluids, and cell suspensions can be aseptically or nontoxically preserved at extremely low temperatures, is provided. The freezer bag is made from a three-layer film where both sides of an ultra-high molecular weight polyethylene film are welded respectively with a thermoplastic resin film having a lower melting point than that of the ultra-high molecular weight polyethylene and having compatibility with the ultra-high molecular weight polyethylene.
    Type: Application
    Filed: December 10, 2004
    Publication date: June 16, 2005
    Inventors: Yoshihiro Yoshikawa, Akio Shirasu, Seiichi Wada, Yoshiyuki Akimoto, Yuji Sasaki, Kazuyuki Takeda