Patents by Inventor Nobuo Nakabayashi
Nobuo Nakabayashi 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: 5466853Abstract: A diester monomer is represented by the formula (I) ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 represent a hadrogen atom, an alkoxy, alkenyloxy or hydroxyalkyloxy carbonyl group having 1 to 20 carbon atoms, or a phosphorylcholine derivative ##STR2## where Y denotes --(CH.sub.2)n, --(CH.sub.2 CH.sub.2 O).sub.n CH.sub.2 CH.sub.2 -- ##STR3## n denotes 1 to 8, m is an integer of 0 or 1, R.sub.4, R.sub.5 and R.sub.6 denote an alkyl or aryl group having 1 to 8 carbon atoms, or a hydroxyalkyl group having 2 to 20 carbon atoms; on the proviso that if R.sub.1 is a hydrogen atom, neither R.sub.2 nor R.sub.3 is a hydrogen atom and at least one of R.sub.2 and R.sub.3 denotes the aforesaid phosphorylcholine derivative group, and that if R.sub.2 is a hydrogen atom, neither R.sub.1 nor R.sub.3 is a hydrogen atom and at least one of R.sub.1 and R.sub.3 denotes the aforesaid phosphorycholine derivative group.Type: GrantFiled: July 19, 1993Date of Patent: November 14, 1995Assignee: NOF CorporationInventors: Yasumi Koinuma, Takeo Matsumoto, Nobuharu Nakada, Nobuo Nakabayashi, Kazuhiko Ishihara
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Patent number: 5461433Abstract: A highly hydrous soft contact lens comprising a copolymer which contains as an ingredient a monomer having constitution similar to that of phospholipid represented by the following general formula: ##STR1## n is an integer of 1-20, and, R.sub.2, R.sub.3 and R.sub.4 are the same or different groups and alkyl or hydroxyalkyl of 1-8 carbon atoms.Further, a treating solution for contact lenses which comprises a polymer containing as an ingredient the above monomer and a solvent which can dissolve the polymer.Type: GrantFiled: August 15, 1994Date of Patent: October 24, 1995Assignee: NOF CorporationInventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Yoshishige Murata, Nobuharu Nakada, Takeo Matsumoto, Yasumi Koinuma
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Patent number: 5368733Abstract: A water-soluble cellulose derivative which is obtained by subjecting a water-soluble cellulose to graft polymerization with 2-methacryloyloxyethyl phosphorylcholine and has a structural unit of the following formula (I): ##STR1## wherein n is an integer of 1-100, as well as a biocompatible material containing the water-soluble cellulose derivative as an effective component thereof. The water-soluble cellulose derivative having such specific structural unit is furnished with both of biocompatibility and affinity to cellulose and is thus utilizable as a biocompatible material, for example for hemocatharsis.Type: GrantFiled: October 13, 1993Date of Patent: November 29, 1994Assignee: NOF CorporationInventors: Nobuo Nakabayashi, Kazuhiko Ishihara
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Patent number: 5264215Abstract: Disclosed is a bone cement composition comprising polyalkyl methacrylate derived from methacrylate having an alkyl group of 1-4 carbon atoms, hydroxyapatite, alkyl methacrylate having an alkyl group of 1-4 carbon atoms, 4-(2-methacryloyloxyethyl)trimellitic acid or anhydride thereof, and a polymerization initiator. Also disclosed are a cured product of the composition, an implant material using the composition and a process for the preparation of the implant material.Type: GrantFiled: October 19, 1990Date of Patent: November 23, 1993Assignees: Nobuo Nakabayashi, Mitsui Petrochemical Industries, Ltd., Asahi Kogaku Kogyo Kabushiki KaishaInventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Takashi Yamamoto
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Patent number: 5243006Abstract: The acrylic copolymer of the present invention is an acrylic copolymer comprising recurring units derived from a (meth)acrylic ester compound and recurring units derived from a vinyl compound having --SO.sub.3 R (wherein R represents a hydrogen atom or a lower alkyl group) or having an acceptable salt thereof, wherein at least a part of ester groups of the (meth)acrylic ester compound is substituted by a group having recurring units derived from a (meth)acrylic ester. The present invention further provides a process for the preparation of the acrylic copolymer and use application of the acrylic copolymer utilizing its adhesion properties.Type: GrantFiled: May 31, 1991Date of Patent: September 7, 1993Assignees: Nobuo Nakabayashi, Mitsui Petrochemical Industries, Ltd.Inventors: Nobuo Nakabayashi, Kazuhiko Ishihara, Takashi Yamamoto, Toru Kinoshita
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Patent number: 5091033Abstract: Adhesives for ceramics obtained as first adhesives for ceramics according to the invention are excellent in bond properties as well as in water resistance because they contain first acidic compounds such as organic carboxylic acids in addition to silane coupling agents, polymerizable monomers and polymerization catalysts. Further, adhesives for ceramics obtained as second adhesives for ceramics according to the invention are excellent in bond properties as well as in dependability and water resistance because they contain metal salts in addition to silane coupling agents, polymerizable monomers and polymerization catalysts. Furthermore, adhesives for ceramics obtained as third adhesives for ceramics according to the invention are excellent in bond properties as well as dependability and water resistance because they contain second acidic compounds selected from among metal salts and organic carboxylic acid anhydrides in addition to silane coupling agents, polymerizable monomers and polymerization catalysts.Type: GrantFiled: December 7, 1990Date of Patent: February 25, 1992Assignee: Mitsui Sekiyu Kagaku Kogyo Kabushiki KaishaInventors: Nobuo Nakabayashi, Narimichi Honda, Mitsuo Nakamura, Takeshi Sakashita
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Patent number: 4952323Abstract: A .beta..sub.2 microglobulin adsorbent composed of hydroxyapatite particles having an average size of 5 to 2,000 .mu.m is disclosed. The adsorbent preferably has a Ca/P ratio of 1.5 to 1.8.Type: GrantFiled: October 7, 1988Date of Patent: August 28, 1990Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Nobuo Nakabayashi, Shozo Koshikawa, Tetsuro Ogawa
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Patent number: 4798585Abstract: A support for a biomedical implant device in which the support has a surface layer composed of a biocompatible calcium phosphate material such as sintered hydroxyapatite with a porosity of 50-60% and pore size of 0.5-500 micrometers. Preferably, the surface layer is formed with projections or recesses of a few hundred micrometers size.Type: GrantFiled: June 8, 1987Date of Patent: January 17, 1989Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Masahide Inoue, Takeshi Ichitsuka, Yasuhiko Hirayama, Shozo Koshikawa, Tateki Kitaoka, Nobuo Nakabayashi, Tatsumichi Takeda, Osamu Minoo
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Patent number: 4368043Abstract: An adhesive cementing agent is provided for the hard tissues of the human body, which contains a phosphoric or phosphonic acid ester compound containing at least one polymerizable functional group and either a group of the formula ##STR1## or a group of the formula ##STR2## or a high molecular weight compound obtainable by polymerizing the compound either alone or as a comonomer unit. This adhesive cementing agent has a high affinity for the tooth, bone and other hard tissues of the human body and enjoys prolonged stability in wet environments.Type: GrantFiled: May 14, 1980Date of Patent: January 11, 1983Assignee: Kuraray Company, LimitedInventors: Junichi Yamauchi, Eiichi Masuhara, Nobuo Nakabayashi, Kyoichiro Shibatani, Tooru Wada
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Patent number: 4362842Abstract: A composite filler obtained by precuring the acrylate or methacrylate of a polyhydric alcohol having at least three ethylenically unsaturated groups in the molecule thereof by using a free-radical initiator in the presence of an inorganic filler, followed by grinding the resultant prepolymer is described. This composite filler remarkably improves the stiffness and hardness of organic resins and rubbers, and prevents a decrease in the impact strength and bending strength of organic resins and rubbers when the composite fillers are compounded into the organic resins and rubbers. Furthermore, a dental composition obtained from the polymerization of a vinyl compound in the presence of the above-mentioned composite filler is described. This dental composition has excellent properties, such as, high hardness, high strength, good adhesiveness, and is suitable for use as dental materials.Type: GrantFiled: July 22, 1980Date of Patent: December 7, 1982Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Eiichi Masuhara, Nobuo Nakabayashi, Katsuhisa Nagata, Morio Takeyama
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Patent number: 4259075Abstract: A tooth cavity is filled by applying to the walls of the tooth cavity a lining composition comprising a phosphoric or phosphonic acid ester compound containing at least one radical polymizerable vinyl group and at least one ##STR1## group, wherein said lining composition contains said phosphoric or phosphonic acid ester compound in a proportion of not less than 0.1 weight percent, as phosphorus, and then filling the remainder of the cavity with a dental filling material which comprises a polymerizable monomer, a filler and a curing agent.Type: GrantFiled: September 24, 1979Date of Patent: March 31, 1981Assignee: Kuraray Co., Ltd.Inventors: Junichi Yamauchi, Eiichi Masuhara, Nobuo Nakabayashi, Kyoichiro Shibatani, Tooru Wada
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Patent number: 4259117Abstract: A dental filling agent is provided, which contains a phosphoric or phosphonic acid ester compound containing at least one polymerizable functional group and either a group of the formula ##STR1## or a group of the formula ##STR2## or a high molecular weight compound obtainable by polymerizing the compound either alone or as a comonomer unit. This agent has a high bonding affinity for the tooth and enjoys prolonged stability in wet environments.Type: GrantFiled: August 25, 1978Date of Patent: March 31, 1981Assignee: Kuraray Co., Ltd.Inventors: Junichi Yamauchi, Eiichi Masuhara, Nobuo Nakabayashi, Kyoichiro Shibatani, Tooru Wada
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Patent number: 4148988Abstract: A curable composition comprising an aromatic dibasic acid having an ethylenically unsaturated group, such as 4-methacryloxyethyltrimellitate, or an acid anhydride thereof, other ethylenically unsaturated monomer and a catalyst is disclosed. This composition is applied between articles to be bonded together and is polymerized and cured to form an adhesive layer excellent in the water resistance and durability. This composition is especially valuable as a dental adhesive or as an undercoating agent for a paint or adhesive.Type: GrantFiled: June 19, 1978Date of Patent: April 10, 1979Assignee: Mitsui Petrochemical Industries Ltd.Inventors: Eiichi Masuhara, Nobuo Nakabayashi, Morio Takeyama
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Patent number: RE34037Abstract: A support for a biomedical implant device in which the support has a surface layer composed of a biocompatible calcium phosphate material such as sintered hydroxyapatite with a porosity of 50-60% and pore size of 0.5-500 micrometers. Preferably, the surface layer is formed with projections or recesses of a few hundred micrometers size.Type: GrantFiled: January 17, 1991Date of Patent: August 18, 1992Assignee: Asahi Kogaku Kogyo K.K.Inventors: Masahide Inoue, Takeshi Ichitsuka, Yasuhiko Hirayama, Shozo Koshikawa, Tateki Kitaoka, Nobuo Nakabayashi, Tatsumichi Takeda, Osamu Minoo