Patents by Inventor Masahiro Yamaji
Masahiro Yamaji 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: 8840922Abstract: Provided is a donepezil-containing transdermal absorption formulation that can sustainably administer donepezil for a long period of time, and can provide both a rapid increase in the blood level of donepezil and donepezil sustained release properties. The donepezil-containing transdermal absorption formulation is a transdermal absorption formulation produced by dissolving donepezil, which is the active ingredient, in an adhesive patch base that contains a hydrophobic polymer and an absorption promoter. The absorption promoter is one kind or two or more kinds selected from lauryl alcohol, triethyl citrate, isopropyl myristate, cetyl lactate, oleyl alcohol, sorbitan monooleate, polyethylene glycol monostearate, lauromacrogol, N-methyl-2-pyrrolidone, and triacetin.Type: GrantFiled: October 18, 2010Date of Patent: September 23, 2014Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Satoshi Kawakami, Masahiro Yamaji
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Publication number: 20140234396Abstract: The present invention provides to patches having excellent skin-permeability and therapeutic effect by the drug with lower irritation. In an external patch in which an adhesive layer containing an adhesive base and a drug are laminated with a backing, the external patch wherein the adhesive base contains 5-50% by weight of synthetic rubber polymer, 10-60% by weight of adhesive resin and 25-60% by weight of liquid paraffin, and the drug is etofenamate. According to the present invention, there is obtainable the patches having excellent skin-permeability and therapeutic effect by the drug with lower irritation.Type: ApplicationFiled: April 29, 2014Publication date: August 21, 2014Applicants: TEIKOKU SEIYAKU CO., LTD., DROSSAPHARM AGInventors: Tomohiro ISHIMA, Hiroyuki YAMASAKI, Masahiro YAMAJI
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Patent number: 8747885Abstract: The present invention provides to patches having excellent skin-permeability and therapeutic effect by the drug with lower irritation. In an external patch in which an adhesive layer containing an adhesive base and a drug are laminated with a backing, the external patch wherein the adhesive base contains 5-50% by weight of synthetic rubber polymer, 10-60% by weight of adhesive resin and 25-60% by weight of liquid paraffin, and the drug is etofenamate. According to the present invention, there is obtainable the patches having excellent skin-permeability and therapeutic effect by the drug with lower irritation.Type: GrantFiled: December 15, 2004Date of Patent: June 10, 2014Assignees: Teikoku Seiyaku Co., Ltd., Drossapharm AGInventors: Tomohiro Ishima, Hiroyuki Yamasaki, Masahiro Yamaji
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Patent number: 8741334Abstract: In a plaster for external use for transdermal absorption in which an adhesive layer is laminated on a plastic backing, the adhesive layer contains a styrene-isoprene-styrene block copolymer (SIS), a tackifying resin and a softener which are essential ingredients, and further contains flurbiprofen blended as an active ingredient. The present plaster for external use is a flurbiprofen containing plaster for external use enabling long-term stable release of contained flurbiprofen, and having excellent stability and very high drug releasing property.Type: GrantFiled: February 28, 2005Date of Patent: June 3, 2014Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Masahiro Yamaji, Takaya Sugawara
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Patent number: 8486442Abstract: An external patch capable of stable prolonged release and transdermal absorption of active ingredient hormones (estrogens and/or progestogens) contained in a pressure sensitive adhesive layer, which external patch ensures low irritation on the skin. In particular, an external patch comprising a support and, superimposed thereon, a pressure sensitive adhesive layer, characterized in that the pressure sensitive adhesive layer comprises, as indispensable components, 5 to 50 wt. % of styrene/isoprene/styrene block copolymer, 20 to 70 wt. % of tackifier resin, 10 to 60 wt. % of softener and 1 to 20 wt. % of polyvinylpyrrolidone and contains, as an active ingredient, estrogen and/or progestogen.Type: GrantFiled: May 13, 2004Date of Patent: July 16, 2013Assignees: Teikoku Seiyaku Co. Ltd., Fuso Pharmaceutical Industries Ltd.Inventors: Kunihiko Matsushita, Kenichi Hattori, Masahiro Yamaji
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Publication number: 20120207816Abstract: Provided is a donepezil-containing transdermal absorption formulation that can sustainably administer donepezil for a long period of time, and can provide both a rapid increase in the blood level of donepezil and donepezil sustained release properties. The donepezil-containing transdermal absorption formulation is a transdermal absorption formulation produced by dissolving donepezil, which is the active ingredient, in an adhesive patch base that contains a hydrophobic polymer and an absorption promoter. The absorption promoter is one kind or two or more kinds selected from lauryl alcohol, triethyl citrate, isopropyl myristate, cetyl lactate, oleyl alcohol, sorbitan monooleate, polyethylene glycol monostearate, lauromacrogol, N-methyl-2-pyrrolidone, and triacetin.Type: ApplicationFiled: October 18, 2010Publication date: August 16, 2012Applicant: Teikiky Seiyaku Co., Ltd.Inventors: Satoshi Kawakami, Masahiro Yamaji
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Patent number: 8124122Abstract: Provided herein is a female hormone-containing patch wherein an active ingredient is highly soluble in a pressure-sensitive adhesive layer and the active ingredient is not adsorbed to a backing, and the patch per se can follow the irregularities on the skin surface or body movements. The patch is an external patch containing, as a female hormone, a follicular hormone estradiol and/or its derivative or a progestational hormone norethisterone and/or its derivative. The external patch comprises an acrylic pressure-sensitive adhesive containing 0.01 to 1% by weight of an isocyanate-based crosslinking agent as an essential ingredient.Type: GrantFiled: August 7, 2003Date of Patent: February 28, 2012Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Takaya Sugahara, Sadanobu Shirai, Masahiro Yamaji
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Patent number: 8029820Abstract: A patch containing tulobuterol in the low concentration and having the stable release-controllability, prepared by laminating an adhesive layer consisting of a rubber, an adhesive resin and a plasticizer on a backing, wherein 1 to 4 w/w % of tulobuterol in the lower concentration as an active ingredient and 0.1 to 3 w/w % of a higher fatty acid as a drug-releasing controlling agent are contained in the adhesive layer.Type: GrantFiled: June 16, 2004Date of Patent: October 4, 2011Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Sadanobu Shirai, Masahiro Yamaji, Osamu Yoshimoto, Mamoru Naruse, Kenichi Hattori, Takako Sueda
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Publication number: 20090297590Abstract: A ketotifen transdermal drug delivery system is provided. In certain embodiments, the system includes a support layer and a plaster layer provided on the support, wherein the plaster layer contains ketotifen freebase. Also provided are methods of using the delivery systems, e.g., for treatment of ophthalmic diseases, and kits containing the delivery systems.Type: ApplicationFiled: September 23, 2008Publication date: December 3, 2009Inventors: Masahiro Yamaji, Adchara Pongpeerapat
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Publication number: 20090022778Abstract: In a plaster for external use for transdermal absorption in which an adhesive layer is laminated on a plastic backing, the adhesive layer contains a styrene-isoprene-styrene block copolymer (SIS), a tackifying resin and a softener which are essential ingredients, and further contains flurbiprofen blended as an active ingredient. The present plaster for external use is a flurbiprofen containing plaster for external use enabling long-term stable release of contained flurbiprofen, and having excellent stability and very high drug releasing property.Type: ApplicationFiled: February 28, 2005Publication date: January 22, 2009Inventors: Masahiro Yamaji, Takaya Sugawara
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Publication number: 20080089926Abstract: The present invention provides to patches having excellent skin-permeability and therapeutic effect by the drug with lower irritation. In an external patch in which an adhesive layer containing an adhesive base and a drug are laminated with a backing, the external patch wherein the adhesive base contains 5-50% by weight of synthetic rubber polymer, 10-60% by weight of adhesive resin and 25-60% by weight of liquid paraffin, and the drug is etofenamate. According to the present invention, there is obtainable the patches having excellent skin-permeability and therapeutic effect by the drug with lower irritation.Type: ApplicationFiled: December 15, 2004Publication date: April 17, 2008Inventors: Tomohiro Ishima, Hiroyuki Yamasaki, Masahiro Yamaji
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Publication number: 20070065493Abstract: An external patch capable of stable prolonged release and transdermal absorption of active ingredient hormones (estrogens and/or progestogens) contained in a pressure sensitive adhesive layer, which external patch ensures low irritation on the skin. In particular, an external patch comprising a support and, superimposed thereon, a pressure sensitive adhesive layer, characterized in that the pressure sensitive adhesive layer comprises, as indispensable components, 5 to 50 wt. % of styrene/isoprene/styrene block copolymer, 20 to 70 wt. % of tackifier resin, 10 to 60 wt. % of softener and 1 to 20 wt. % of polyvinylpyrrolidone and contains, as an active ingredient, estrogen and/or progestogen.Type: ApplicationFiled: May 13, 2004Publication date: March 22, 2007Applicants: TEIKOKU SEIYAKU CO. LTD., FUSO PHARMACEUTICAL INDUSTRIES, LTD.Inventors: Kunihiko Matsushita, Kenichi Hattori, Masahiro Yamaji
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Patent number: 7094421Abstract: It is provided the plaster of anti-inflammatory and analgesic, improving the sustained releasing of 4-biphenylacetic acid from the base adhesive material and low skin irritation, by using more than two kinds of resolvent for 4-biphenylacetic acid having low solubility in solvents. More specifically, it is provided plasters essentially containing 5–50% by weight of styrene-isoprene-styrene block copolymer, 0.05–20% by weight of N-methyl-2-pyrrolidone, 0.1–20% by weight of polyethylene glycol and 0.1–20% by weight of 4-biphenylacetic acid.Type: GrantFiled: May 31, 2001Date of Patent: August 22, 2006Assignee: Teikoku Seiyaki Co., Ltd.Inventors: Mitsuji Akazawa, Katsuyuki Inoo, Masahiro Yamaji
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Publication number: 20060127464Abstract: Provided herein is a female hormone-containing patch wherein an active ingredient is highly soluble in a pressure-sensitive adhesive layer and the active ingredient is not adsorbed to a backing, and the patch per se can follow the irregularities on the skin surface or body movements. The patch is an external patch containing, as a female hormone, a follicular hormone estradiol and/or its derivative or a progestational hormone norethisterone and/or its derivative. The external patch comprises an acrylic pressure-sensitive adhesive containing 0.01 to 1% by weight of an isocyanate-based crosslinking agent as an essential ingredient.Type: ApplicationFiled: August 7, 2003Publication date: June 15, 2006Inventors: Takaya Sugawara, Sadanobu Shirai, Masahiro Yamaji
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Publication number: 20050220852Abstract: A patch containing turobuterol in the low concentration and having the stable release-controllability, prepared by laminating an adhesive layer consisting of a rubber, an adhesive resin and a plasticizer on a backing, wherein 1 to 4 w/w % of turobuterol in the lower concentration as an active ingredient and 0.1 to 3 w/w % of a higher fatty acid as a drug-releasing controlling agent are contained in the adhesive layer.Type: ApplicationFiled: June 16, 2004Publication date: October 6, 2005Applicant: TEIKOKU SEIYAKU CO., LTDInventors: Sadanobu Shirai, Masahiro Yamaji, Osamu Yoshimoto, Mamoru Naruse, Kenichi Hattori, Takako Sueda
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Publication number: 20020173736Abstract: It is provided the plaster of anti-inflammatory and analgesic, improving the sustained releasing of 4-biphenylacetic acid from the base adhesive material and low skin irritation, by using more than two kinds of resolvent for 4-biphenylacetic acid having low solubility in solvents. More specifically, it is provided plasters essentially containing 5-50% by weight of styrene-isoprene-styrene block copolymer, 0.05-20% by weight of N-methyl-2-pyrrolidone, 0.1-20% by weight of polyethylene glycol and 0.1-20% by weight of 4-biphenylacetic acid.Type: ApplicationFiled: January 30, 2002Publication date: November 21, 2002Inventors: Mitsuji Akazawa, Katsukyuki Inoo, Masahiro Yamaji
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Patent number: 6262121Abstract: The oil patches containing diclofenac sodium which are characterized in that diclofenac sodium, isostearic acid and a fatty acid having 10 to 18 carbon atoms which is liquid at ordinary temperature are combined in an adhesive.Type: GrantFiled: May 17, 1999Date of Patent: July 17, 2001Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Toshikuni Kawaji, Masahiro Yamaji
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Patent number: 6231884Abstract: The present invention provides plasters containing an adhesive base material which comprise , by wt % of the adhesive base material, 15-25 wt % of isosorbide dinitrate, 15-35 wt % of styrene-isoprene-styrene block copolymer, 35-55 wt % of rosin resin, 5-20 wt % of liquid rubber, 0.1-2 wt % of antioxidant, and 0.1-5 wt % of oleic acid for transdermal application. The plasters of the present invention have excellent adhesion and stable releasing of the active ingredient from the adhesive layer after applied to the skin.Type: GrantFiled: August 10, 1999Date of Patent: May 15, 2001Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Toshikuni Kawaji, Masahiro Yamaji
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Patent number: 6177098Abstract: Patch preparations for percutaneous adsorption with the use of supports showing appropriate strength as a patch support, which are excellent in drug barrier characteristics, compatibility with the skin, ODT effects and handling characteristics and can sustain these specific properties in a stable state over a prolonged period of time, thus ensuring good percutaneous absorption of drugs. In these patch preparation, use is made as the support of polyester film/nonwoven vinylon fabric laminates showing an elongation percentage of at least 5% and a tensile cutting load of at least 0.5 kg/10 mm, when measured by the test method specified in JIS K6732. In particular, the thickness of the polyester film constituting the laminate supports ranges from 1.5 to 6.0 &mgr;m and the unit weight of the nonwoven vinylon fabric ranges from 3 to 12 g/m2.Type: GrantFiled: June 23, 1999Date of Patent: January 23, 2001Assignee: Teikoku Seiyaku Co., Ltd.Inventors: Toshikuni Kawaji, Masahiro Yamaji