Patents by Inventor Kiyoshi Iwamoto
Kiyoshi Iwamoto 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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Publication number: 20070276008Abstract: The present invention provides pharmaceutical formulations suitable for intravenous injection comprising a lyophilized anti-ulcerative agent reconstituted in isotonic solutions suitable for intravenous administration, such as 5% dextrose or 0.9% sodium chloride. The solutions are brought to a pH of between about 9 and about 12, preferably between about pH 10 and 11, by a glycine-sodium hydroxide buffer. Such formulations are chemically and physically stable, and do not significantly change color, for at least between about 6 and about 12 hours at room temperature, and are stable to color change for from between about 24 and 48 hours if kept at 5° C.Type: ApplicationFiled: February 6, 2007Publication date: November 29, 2007Applicant: Eisai Company LimitedInventors: James McShane, Ray Wood, Sumio Watanabe, Kiyoshi Iwamoto, Katsumi Onai
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Patent number: 7279512Abstract: A water-based ink composition for a ballpoint pen containing at least colored resin particles which have an average particle diameter of 2 to 20 ?m and which are non-thermoplastic in a proportion of 5 to 30% by weight based on the total amount of the ink composition and non-colored particles having a glass transition point of lower than 0° C. The average particle diameter of the non-colored particles is controlled preferably to 0.01 to 10 ?m. The composition preferably includes at least one selected from ethylene oxide or propylene oxide adducts of glycerin and ethylene oxide or propylene oxide adducts of diglycerin in a proportion of 1 to 30% by weight based on the total amount of the ink composition.Type: GrantFiled: November 7, 2002Date of Patent: October 9, 2007Assignee: Mitsubishi Pencil Kabushiki KaishaInventors: Kiyoshi Iwamoto, Hideaki Tomi, Yoji Takeuchi, Masaru Miyamoto
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Patent number: 7230014Abstract: The present invention provides pharmaceutical formulations suitable for intravenous injection comprising a lyophilized anti-ulcerative agent reconstituted in isotonic solutions suitable for intravenous administration, such as 5% dextrose or 0.9% sodium chloride. The solutions are brought to a pH of between about 9 and about 12, preferably between about pH 10 and 11, by a glycine-sodium hydroxide buffer. Such formulations are chemically and physically stable, and do not significantly change color, for at least between about 6 and about 12 hours at room temperature, and are stable to color change for from between about 24 and 48 hours if kept at 5° C.Type: GrantFiled: April 14, 2000Date of Patent: June 12, 2007Assignee: Eisai Co., Ltd.Inventors: James McShane, Ray Wood, Sumio Watanabe, Kiyoshi Iwamoto, Katsumi Onai
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Publication number: 20050143485Abstract: Provided is a water-based ink composition for a ballpoint pen characterized by comprising at least colored resin particles which have an average particle diameter of 2 to 20 ?m and which are non-thermoplastic in a proportion of 5 to 30% by weight based on the total amount of the ink composition and non-colored particles having a glass transition point of 60° C. or higher. The average particle diameter of the non-colored particles described above is controlled preferably to 0.01 to 10 ?m. The water-based ink composition for a ballpoint pen described above further comprises preferably at least one selected from ethylene oxide or propylene oxide adducts of glycerin and ethylene oxide or propylene oxide adducts of diglycerin in a proportion of 1 to 30% by weight based on the total amount of the ink composition. The above water-based ink composition for a ballpoint pen is further stable with the passage of time and excellent in a writing performance, erasability by an eraser and abrasion resistance.Type: ApplicationFiled: November 7, 2002Publication date: June 30, 2005Inventors: Kiyoshi Iwamoto, Hideaki Tomi, Yoii Takeuchi, Masaru Miyamoto
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Publication number: 20050043439Abstract: Provided is a water-based ink composition for a ballpoint pen characterized by comprising at least colored resin particles which have an average particle diameter of 2 to 20 ?m and which are non-thermoplastic in a proportion of 5 to 30% by weight based on the total amount of the ink composition and non-colored particles having a glass transition point of lower than 0° C. The average particle diameter of the non-colored particles described above is controlled preferably to 0.01 to 10 ?m. The water-based ink composition for a ballpoint pen described above further comprises preferably at least one selected from ethylene oxide or propylene oxide adducts of glycerin and ethylene oxide or propylene oxide adducts of diglycerin in a proportion of 1 to 30% by weight based on the total amount of the ink composition. The above water-based ink composition for a ballpoint pen is stable with the passage of time and excellent in a writing performance, erasability by an eraser and abrasion resistance.Type: ApplicationFiled: November 7, 2002Publication date: February 24, 2005Inventors: Kiyoshi Iwamoto, Hideaki Tomi, Yoii Takeuchi, Masaru Miyamoto
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Patent number: 6815021Abstract: The present invention provides a recording medium for ink jet printers in which superior image recording quality and color stability are exhibited. In a recording medium for ink jet printers in which an ink receiving layer contained at least pigment and binder resin is provided on a supporting material, partially saponified PVA having a degree of saponification of 85.0 to 73.0 mol % and a degree of polymerization of 300 to 1500, is contained in the ink receiving layer as a color stability improving component.Type: GrantFiled: March 30, 2000Date of Patent: November 9, 2004Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., Ltd.Inventors: Takayuki Ishikawa, Nobuhiro Kubota, Minoru Tsuchida, Shigeki Asai, Takeshi Yoshimoto, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
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Patent number: 6656544Abstract: A recording medium for ink jet printers having superior effects in preventing recorded image deterioration such as lowering of image clarity, decrease in density, change in color tone, etc., under high temperature and high humidity, is provided. An ink receiving layer is formed on a base material by coating acrylic copolymer containing at least (meth)acrylate having a solubility parameter (&dgr;) of 15.0 to 23.0 MPa½ as a copolymerizing component, and thereby a recording medium for ink jet printers is produced.Type: GrantFiled: June 26, 2001Date of Patent: December 2, 2003Assignee: Tomoegawa Paper Co., LTDInventors: Takayuki Ishikawa, Nobuhiro Kubota, Shigeki Asai, Minoru Tsuchida, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
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Patent number: 6565952Abstract: The invention provides an ink-jet recording sheet having an excellent preventive effect on overall. degradation by light such as degradation of image clarity, and decrease in density or change of tone of images, and a resin composition for ink-jet recording media used in the formation thereof. The recording sheet of the invention comprises a substrate and as an ink-receiving layer provided on the substrate, a layer containing an acrylic resin comprising, as copolymerizable monomers, (a) a dialkylaminoalkyl methacrylate, (b) acrylamide and (c) at least one monomer selected from among an. alkoxypolyethylene glycol methacrylate, a 2-hydroxyalkyl methacrylate and a 2-hydroxyalkyl acrylate.Type: GrantFiled: January 3, 2001Date of Patent: May 20, 2003Assignees: Tomoegawa Paper Co., Ltd., Seiko Epson CorporationInventors: Takayuki Ishikawa, Shinichiro Kobayashi, Takeshi Yoshimoto, Nobuhiro Kubota, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Sano
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Patent number: 6548150Abstract: A recording medium for ink jet printers having superior recording properties for ink jet printers and having superior surface strength in which recorded images are not easily peeled. Acrylic type copolymer in which at least three components of an A component: (metha)acrylate; a B component: hydroxyalkyl (metha)acrylate; and a C component: antioxidation monomer and/or ultraviolet ray absorptivity monomer are copolymerizing components is contained in a coating solution, an ink receiving layer is provided by coating this solution on a base material, whereby a recording medium for ink jet printers is formed.Type: GrantFiled: September 25, 2000Date of Patent: April 15, 2003Assignees: Seiko Epson Corporation, Tomoegawa Paper Co., Ltd.Inventors: Takayuki Ishikawa, Takeshi Yoshimoto, Nobuhiro Kubota, Shinichiro Kobayashi, Kiyoshi Iwamoto, Jun Sugiyama, Hiroyuki Onishi, Yukari Ishikawa
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Publication number: 20020177611Abstract: The present invention provides pharmaceutical formulations suitable for intravenous injection comprising a lyophilized anti-ulcerative agent reconstituted in isotonic solutions suitable for intravenous administration, such as 5% dextrose or 0.9% sodium chloride. The solutions are brought to a pH of between about 9 and about 12, preferably between about pH 10 and 11, by a glycine-sodium hydroxide buffer. Such formulations are chemically and physically stable, and do not significantly change color, for at least between about 6 and about 12 hours at room temperature, and are stable to color change for from between about 24 and 48 hours if kept at 5° C.Type: ApplicationFiled: May 3, 2002Publication date: November 28, 2002Inventors: James McShane, Ray Wood, Sumio Watanabe, Kiyoshi Iwamoto, Katsumi Onai
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Patent number: 6455169Abstract: An inkjet recording sheet whose discoloration, which is caused with the passage of time, is prevented, the inkjet recording sheet comprising a substrate and an ink receptor layer formed on the substrate, the ink receptor layer containing a polymer obtained from a monomer component containing at least vinyl-polymerizable monomer containing a basic nitrogen atom, the ink receptor layer containing a polymerization inhibitor in an amount of 10 to 500 ppm.Type: GrantFiled: October 18, 1999Date of Patent: September 24, 2002Assignees: Tomoegawa Paper Co., Ltd., Seiko Epson CorporationInventors: Kiyoshi Iwamoto, Senichi Yoshizawa, Hiroyuki Onishi, Masaaki Itano, Akio Owatari
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Patent number: 6391927Abstract: Dispersibility of thickener is constant for every lot and viscosity difference is little. Fine bubbles existing in the thicker in ink follower are removed. A step of homogenizing the thickener at any temperature within a range of 40° C. to 130° C. is included. Preferably, a step of homogenizing the thickener at any temperature within a range of 100° C. to 130° C. is included.Type: GrantFiled: April 7, 2000Date of Patent: May 21, 2002Assignee: Mitsubishi Pencil KabushikikaishaInventors: Norio Ogura, Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi
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Patent number: 6376560Abstract: This invention relates to ink follower for a water-base ballpoint pen with its bubbles removed, time-dependent stability, less oil separation, and greatly reduced lot-to-lot viscosity difference and associated performance difference, and a method for manufacturing the same. After addition of thickener, the follower is made depressurized preferably at 0.2 atm or lower. Simultaneous heating and stirring are preferable. When the ink follower is solely debubbled in advance, fine bubbles contained in particulate silica, clay thickener, etc. can be very highly removed even if the centrifugal debubbling is not so strong and there is no bad affection to the writing property of the pen. It is also possible that, after adding the thickener, a centrifugal force greater than or equal to 200-fold of the gravitational acceleration is applied to debubble.Type: GrantFiled: April 7, 2000Date of Patent: April 23, 2002Assignee: Mitsubishi Pencil KabushikikaishaInventors: Norio Ogura, Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi
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Patent number: 6350507Abstract: The present invention provides a superior recording sheet for ink jet printers which can completely satisfy property requirements such as light resistance of the printing images. The recording sheet for an ink jet printer includes a water-soluble divalent or greater metallic salt, so that properties such as light resistance are improved very effectively.Type: GrantFiled: March 16, 1999Date of Patent: February 26, 2002Assignees: Tomoegawa Paper Co., Ltd., Seiko Epson CorporationInventors: Kiyoshi Iwamoto, Shinitiro Kobayashi, Takeshi Yoshimoto, Takayuki Ishikawa, Nobuhiro Kubota, Jun Sugiyama, Hiroyuki Onishi, Yukari Sano
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Patent number: 6245422Abstract: A recording medium which can prevent a failure of the recording medium to be fed or carried in a printer without sacrificing the glossiness is disclosed. Addition of a mixture of a spherical silica with a nonspherical silica to a gloss surface layer of a recording medium realizes good glossiness with good feedability and carriability in a printer.Type: GrantFiled: August 29, 1997Date of Patent: June 12, 2001Assignee: Seiko Epson Corporation & Tomoegawa Paper Co., Ltd.Inventors: Hiroyuki Onishi, Masaaki Itano, Kiyoshi Iwamoto, Senichi Yoshizawa
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Patent number: 6235724Abstract: The present invention provides a preparation for injection containing a lipid A analog and a process for preparing the same. A preparation for injection prepared by dissolving a lipid A analog or a pharmacologically acceptable salt thereof in an alkaline aqueous solution, at an elevated temperature if necessary, and then adding a buffer thereto, and a process for preparing the same.Type: GrantFiled: December 18, 1998Date of Patent: May 22, 2001Assignee: Eisai Co., Ltd.Inventors: Yasuyuki Asai, Katsumi Onai, Kazuhide Ashizawa, Kiyoshi Iwamoto, Yasuo Ishibashi, Sumio Watanabe
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Patent number: 6227738Abstract: Lot-to-lot or time-dependent instability in quality of the known ink follower for water-base ballpoint pens is overcome. Particulate silica, or organic-treated clay is kneaded as thickener with base oil to prepare gel matter. The gel matter is pressurized to eliminate fine bubbles to yield ink follower for water-base ballpoint pens. The pressurization is preferably performed at 2 atm or higher. The elimination of the bubbles is more effective when the ink follower is, under pressurization, stirred and/or heated.Type: GrantFiled: November 26, 1999Date of Patent: May 8, 2001Assignee: Mitsubishi Pencil KabushikikaishaInventors: Norio Ogura, Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi
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Patent number: 6139940Abstract: It is an object of the present invention to provide an inkjet recording sheet which can solve the problems of conventional inkjet printing sheets which has good ink absorbing properties, storage properties causing no blocking, clearness of printed images, and excellent fixing properties; and which can provide highly fine images without blurring in full color printing; therefore, in order to accomplish the objects, the of the present invention comprises an ink absorbing layer on at least one surface of a substrate, and an ink impermeable layer comprising a hydrophobic resin on the surface of the ink absorbing layer.Type: GrantFiled: June 18, 1998Date of Patent: October 31, 2000Assignee: Tomoegawa Paper Co., Ltd.Inventors: Kiyoshi Iwamoto, Senichi Yoshizawa
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Patent number: 6120590Abstract: Provided is a water based ink having a metallic lustrous color for a ballpoint pen in which a metal powder pigment or aluminum powder and a complementary colorant (pigment or a colored water-insoluble polymer fine particles) are used as a colorant and further in addition to a thickener, a polar solvent and water, particularly a resin emulsion is used in combination to reduce the use amount of the thickener to thereby lower the viscosity. The ink is improved in follow-up property to be able to write continuously, develops a metallic color of a rainbow color on writing paper having a dark color and provides lines having water resistance and weatherability. The ink does not allow the metal powder and the pigment to settle and separate though the viscosity is low.Type: GrantFiled: June 9, 1999Date of Patent: September 19, 2000Assignee: Mitsubishi Pencil Kabushiki KaishaInventors: Masaru Miyamoto, Kiyoshi Iwamoto
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Patent number: 5958564Abstract: An ink jet recording sheet comprising: a support member; a first ink receiving layer comprising at least silica which is on the support member, and a second ink receiving layer comprising at least silica in different conditions from the conditions in the first ink receiving layer, and which is on the first ink receiving layer.Type: GrantFiled: December 24, 1996Date of Patent: September 28, 1999Assignee: Tomoegawa Paper Co., Ltd.Inventors: Kiyoshi Iwamoto, Senichi Yoshizawa