Patents by Inventor Ryuji Kubota
Ryuji Kubota 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: 9012499Abstract: The present invention provides a pharmaceutical composition comprising: one or more excipients selected from sugars and sugar alcohols in which equilibrium water content is 1% by weight or less at 25° C. and at 70% relative humidity; and oseltamivir phosphate, wherein an amount of each of glucose and mannose contained in the sugars and sugar alcohols as impurities is 0.01% by weight or less.Type: GrantFiled: February 20, 2007Date of Patent: April 21, 2015Assignees: Chugai Seiyaku Kabushiki Kaisha, F. Hoffman-la Roche AGInventors: Ryuji Kubota, Tomoaki Ohta, Tomoaki Hirayama, Hiroyuki Maeda, Christian Volland, Hans-Guenter Kaestle
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Publication number: 20100222427Abstract: The present invention provides a pharmaceutical composition comprising: one or more excipients selected from sugars and sugar alcohols in which equilibrium water content is 1% by weight or less at 25° C. and at 70% relative humidity; and oseltamivir phosphate, wherein an amount of each of glucose and mannose contained in the sugars and sugar alcohols as impurities is 0.01% by weight or less.Type: ApplicationFiled: February 20, 2007Publication date: September 2, 2010Applicants: CHUGAI SEIYAKU KABUSHIKI KAISHA, F. HOFFMAN-LA ROCHE AGInventors: Ryuji Kubota, Tomoaki Ohta, Tomoaki Hirayama, Hiroyuki Maeda, Christian Volland, Hans-Guenter KAeStle
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Publication number: 20070190135Abstract: Disclosed are a phosphate-binding polymer having a true specific gravity of 1.18-1.24, tablets that solely consist of the particles of a phosphate-binding polymer having an average particle size of no more than 400 ?m, with at least 90% being occupied by particles no larger than 500 ?m, and having a true specific gravity of 1.18-1.24 and a water content of 1-14%, or tablets that contain both the particles and crystalline cellulose and/or low substituted hydroxypropyl cellulose, and a process for producing such tablets. The phosphate-binding polymer can be formulated as tablets either alone or in combination with specified additives. Whichever the case, the tablets have satisfactory hardness, contain the active ingredient in high proportion, have high phosphate-binding capability and exhibit rapid disintegrability in an acidic to neutral region while having little sensitivity to the strength of agitation.Type: ApplicationFiled: March 12, 2007Publication date: August 16, 2007Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Katsuya Matsuda, Ryuji Kubota, Noriyuki Takata
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Patent number: 7081256Abstract: A quinolinone derivative pharmaceutical composition comprising a quinolinone derivative represented by the structural formula (I): wherein the quinolinone derivative is in the form of particles, which have an average particle diameter of 0.5 to 10 ?m and such a particle size distribution that particles having a particle diameter of 15 ?m or less account for 90% or more of the totality of the particles, and also have a fusion enthalpy of 30 J/g or more, and the surface of the particles are coated with a water-soluble composition containing a water-soluble polymer, can quickly dissolve an active ingredient in the digestive tract and is also superior in long-term storage stability.Type: GrantFiled: June 17, 2002Date of Patent: July 25, 2006Assignee: Dainippon Ink and Chemicals, Inc.Inventors: Ryuji Kubota, Hiroshi Araya, Kouki Obata, Nobuyuki Kimura, Hiroyuki Fukui, Hidetsugu Takagaki
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Patent number: 6696087Abstract: A tablet containing a phosphate-binding polymer, which has an average particle size of 400 &mgr;m or less, contains particles of 500 &mgr;m or less in particle size at a ratio of 90% or more and has a moisture content of 1 to 14%, together with crystalline cellulose and/or low substituted hydroxypropylcellulose and contains the active component at a high ratio, is excellent in the ability to bind to phosphate, and quickly disintegrates in an acidic to a neutral region.Type: GrantFiled: March 6, 2002Date of Patent: February 24, 2004Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Katsuya Matsuda, Ryuji Kubota
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Publication number: 20030130310Abstract: A quinolinone derivative pharmaceutical composition comprising a quinolinone derivative represented by the structural formula (I): 1Type: ApplicationFiled: June 17, 2002Publication date: July 10, 2003Applicant: Dainippon Ink and Chemicals, Inc.Inventors: Ryuji Kubota, Hiroshi Araya, Kouki Obata, Nobuyuki Kimura, Hiroyuki Fukui, Hidetsugu Takagaki
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Publication number: 20020122786Abstract: A tablet containing a phosphate-binding polymer, which has an average particle size of 400 &mgr;m or less, contains particles of 500 &mgr;m or less in particle size at a ratio of 90% or more and has a moisture content of 1 to 14%, together with crystalline cellulose and/or low substituted hydroxypropyl cellulose and contains the active component at a high ratio, is excellent in the ability to bind to phosphate, and quickly disintegrates in an acidic to a neutral region.Type: ApplicationFiled: March 6, 2002Publication date: September 5, 2002Applicant: CHUGAI SEIYAKU KABUSHIKI KAISHAInventors: Katsuya Matsuda, Ryuji Kubota
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Patent number: 6383518Abstract: A tablet containing a phosphate-binding polymer, which has an average particle size of 400 &mgr;m or less, contains particles of 500 &mgr;m or less in particle size at a ratio of 90% or more and has a moisture content of 1 to 14%, together with crystalline cellulose and/or low substituted hydroxypropylcellulose, and a process for producing the same are disclosed. The phosphate-binding polymer tablet according to the present invention contains the active component at a high ratio, is excellent in the ability to bind to phosphate and is a quickly disintegrated in an acidic to a neutral region while being little affected by the stirring strength. Accordingly, it is an excellent preparation capable of regulating changes in bioavailability due to the gastrointestinal motions and pH value.Type: GrantFiled: September 21, 1999Date of Patent: May 7, 2002Assignee: Chugai Seiyaku Kabushiki KaishaInventors: Katsuya Matsuda, Ryuji Kubota
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Patent number: 5087408Abstract: A nuclear reactor facility including a primary containment vessel, a reactor pressure vessel installed in the primary containment vessel and accommodating a reactor core in a lower part thereof, and a vertical cylindrical wall disposed in a lower part of the primary containment vessel around and spaced from the reactor pressure vessel so as to delimit an annular space therebetween. The vertical cylindrical wall has an upper end disposed at a position higher than an upper end of the reactor core and a diaphragm extends substantially horizontally between the upper end of the vertical cylindrical wall and an inner wall of the primary containment vessel for cooperating with the vertical cylindrical wall to separate a space in the primary containment vessel around the reactor pressure vessel into a pressure suppression chamber and a drywell which includes annular space.Type: GrantFiled: August 15, 1990Date of Patent: February 11, 1992Inventors: Kenji Tominaga, Minoru Miki, Tooru Takahashi, Tetsuo Horiuchi, Hideo Morishima, Takashi Nakayama, Kumiaki Moriya, Masaki Matsumoto, Minoru Akita, Tsuyoshi Niino, Kanehiro Ochiai, Akihiko Shiozawa, Yuichi Uchiyama, Toyoharu Yasuno, Kenji Moriya, Shouichirou Kinoshita, Kazuo Kage, Ryuji Kubota
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Patent number: 5011652Abstract: A container-outer-periphery pool in which water is stored is provided between a primary containment vessel and a reactor building, and outside of a pressure suppression pool. Consequently, the natural heat transfer capabilities of reactor facilities is enhanced, and the inherent safety of the reactor facilities is improved.Type: GrantFiled: September 18, 1987Date of Patent: April 30, 1991Assignees: Hitachi, Ltd., Hitachi Engineering Co., Ltd.Inventors: Kenji Tominaga, Minoru Miki, Tooru Takahashi, Tetsuo Horiuchi, Hideo Morishima, Takashi Nakayama, Kumiaki Moriya, Masaki Matsumoto, Minoru Akita, Tsuyoshi Niino, Kanehiro Ochiai, Akihiko Shiozawa, Yuichi Uchiyama, Toyoharu Yasuno, Kenji Moriya, Shouichirou Kinoshita, Kazuo Kage, Ryuji Kubota