Patents by Inventor Masakazu Iwai
Masakazu Iwai 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: 5264681Abstract: The invention relates to a ceramic heater for use, e.g., as a glow plug for a diesel engine or as an igniter for an oil or gas burner. The ceramic heater has a nonoxide ceramic body having a heating part and a supporting part and a heating resistor embedded in the heating part of the ceramic body. The material of the heating resistor is W, WC, tungsten alloy or a metal nitride such as TiN or TaN. According to the invention the heating part of the ceramic body is formed of aluminum nitride ceramic, which is high in heat conductivity and resistant to oxidation at high temperatures, at least in a core region in contact with the heating resistor, and the supporting part is formed of silicon nitride ceramic which is low in heat conductivity at least in a surface region.Type: GrantFiled: February 7, 1992Date of Patent: November 23, 1993Assignee: NGK Spark Plug Co., Ltd.Inventors: Shunkichi Nozaki, Yasuhiko Suzuki, Kazuho Tatematsu, Masakazu Iwai, Kiminori Horiki
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Patent number: 5053498Abstract: A therapeutic and prophylactic agent for peptic ulcers which contains as an active ingredient a compound of the general formula (I): ##STR1## wherein R.sub.1 represents hydrogen or .dbd.O; R.sub.2 represents hydrogen or --OR.sub.5 ; R.sub.3 represents hydrogen or --OR.sub.5 ; R.sub.4 represents --OR.sub.7 in the case of the absence of double bond; R.sub.5, R.sub.6 and R.sub.7 each represents hydrogen or an organic residue;X represents group (A);.dbd.C.dbd.CH--COR.sub.8 (A)or group (B): ##STR2## wherein R.sub.8 represents alkyl, and R.sub.9 and R.sub.10 each represents hydrogen or an organic residue; with the proviso that when X represents group (A), then R.sub.1 and R.sub.3 both represent hydrogen, R.sub.2 represents --OR.sub.5, R.sub.4 represents OR.sub.7 and the bond between the carbon atom to which X is attached and the carbon atom to which R.sub.4 is attached is a single bond, and when X represents group (B), then R.sub.1 represents .dbd.O, R.sub.2 represents hydrogen, R.sub.3 represents --OR.sub.Type: GrantFiled: October 16, 1989Date of Patent: October 1, 1991Assignee: Green Cross CorporationInventors: Yusei Shiraga, Chikara Fukaya, Toshiaki Akira, Masakazu Iwai, Kazumasa Yokoyama, Mamoru Tabata, Hiroshi Fukui, Shigeo Tanaka, Yoshiro Iga, Tadakazu Suyama, Kanemichi Okano
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Patent number: 4983584Abstract: A therapeutic and prophylactic agent for peptic ulcers comprising as an effective ingredient a cyclohexane derivative represented by general formula (I): ##STR1## wherein A represents a group shown by formula, >CH.sub.2, ##STR2## wherein X represents ethynylene, vinylene or ethylene, Y represents oxo or a hydroxy group; R.sup.1, R.sup.3, R.sup.4 and R.sup.5 each represents a hydrogen atom or alkyl; R.sup.2 represents a hydrogen atom, alkyl or a group shown by --OR.sup.8 ;R.sup.6 represents a hydrogen atom, oxo or a group shown by --OR.sup.8 ; and R.sup.7 represents a hydrogen atom or a group shown by --OR.sup.8, wherein R.sup.8 represents a hydrogen atom or an organic residue.Type: GrantFiled: November 23, 1987Date of Patent: January 8, 1991Assignee: Green Cross CorporationInventors: Chikara Fukaya, Hitoshi Yasuda, Toshiaki Akira, Masakazu Iwai, Kanemichi Okano, Kazumasa Yokoyama
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Patent number: 4916130Abstract: An antithrombotic composition containing an amide derivative which is obtained by binding a sulfur-containing amine to an unsaturated fatty acid having 4 to 13 carbon atoms through an amide bond and which exerts a high platelet agglutination-inhibiting effect.Type: GrantFiled: September 8, 1988Date of Patent: April 10, 1990Assignee: Green Cross CorporationInventors: Masakazu Iwai, Chikara Fukaya, Kazumasa Yokoyama
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Patent number: 4888417Abstract: A therapeutic and prophylactic agent for peptic ulcers which contains as an active ingredient a compound of the general formula (I): ##STR1## wherein R.sub.1 represents hydrogen or =O; R.sub.2 represents hydrogen or --OR.sub.5 ; R.sub.3 represents hydrogen or --OR.sub.6 ; R.sub.4 represents --OR.sub.7 in the case of the absence of double bond; R.sub.5, R.sub.6 and R.sub.7 each represents hydrogen or an organic residue;X represents group (A):.dbd.C.dbd.CH--COR.sub.8 (A)or group (B): ##STR2## wherein R.sub.8 represents alkyl, and R.sub.9 and R.sub.10 each represents hydrogen or an organic residue; with the proviso that when X represents group (A), then R.sub.1 and R.sub.3 both represent hydrogen, R.sub.2 represents --OR.sub.5 ; R.sub.4 represents OR.sub.7 and the bond between the carbon atoms to which X is attached and the carbon atom to which R.sub.4 is attached is a single bond, and when X represents group (B), then R.sub.1 represents .dbd.O, R.sub.2 represents hydrogen, R.sub.3 represents --OR.sub.Type: GrantFiled: May 27, 1986Date of Patent: December 19, 1989Assignee: Green Cross CorporationInventors: Yusei Shiraga, Chikara Fukaya, Toshiaki Akira, Masakazu Iwai, Kazumasa Yokoyama, Mamoru Tabata, Hiroshi Fukui, Shigeo Tanaka, Yoshiro Iga, Tadakazu Suyama, Kanemichi Okano
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Patent number: 4849404Abstract: Fab or Fc fragment of human IgG which is obtainable by enzymatic digestion of the human IgG is reduced by a reducing agent to sever an interchain of disulfide bonds therein and then blocked the SH radicals formed with alkyl group which may contain other groups. The resulting alkylated Fab and Fc fragments display therapeutic and prophylactic action for gastrointestinal ulcers by the oral or parenteral administration.Type: GrantFiled: March 3, 1988Date of Patent: July 18, 1989Assignee: The Green Cross CorporationInventors: Masakazu Iwai, Kazumasa Yokoyama, Tsunekazu Fukushima
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Patent number: 4748157Abstract: Fab or Fc fragment of human IgG which is obtainable by enzymatic digestion of the human IgG is reduced by a reducing agent to sever an interchain of disulfide bonds therein and then blocked the SH radicals formed with alkyl group which may contain other group. The resulting alkylated Fab and Fc fragments display therapeutic and prophylactic action for gastrointestinal ulcers by the oral or parenteral administration.Type: GrantFiled: February 4, 1986Date of Patent: May 31, 1988Assignee: The Green Cross CorporationInventors: Masakazu Iwai, Kazumasa Yokoyama, Tsunekazu Fukushima
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Patent number: 4186253Abstract: An organ to be transplanted, such as kidney, can effectively be preserved by perfusion for a considerably long time by the use of a perfusate which is made by mixing a Ringer's solution modified by increasing potassium ion to 8-20 meq/l, a stable perfluorocarbon compound emulsion and albumin, so that the concentration of the perfluorocarbon compound is 7.5 to 12.5% (W/V) and that of albumin is 1-8% (W/V) based on the perfusate.Type: GrantFiled: October 10, 1978Date of Patent: January 29, 1980Assignee: The Green Cross CorporationInventors: Kazumasa Yokoyama, Masakazu Iwai, Hiroyuki Okamoto, Noboru Yamada