Patents by Inventor Yutaka Shiomi
Yutaka Shiomi 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: 5324450Abstract: An optically active glycidyl ether, which is useful in making .gamma.-lactone containing liquid crystalline compounds, the ether having the following formula: ##STR1## wherein R.sup.1 is a group selected from the group consisting of ##STR2## n is 0 or 1; e is 1; R.sup.3 is an alkyl group having 1 to 15 carbon atoms; and the symbol * is an asymmetric carbon atom.Type: GrantFiled: May 24, 1993Date of Patent: June 28, 1994Assignee: Daiso Co., Ltd.Inventors: Kazuhiko Sakaguchi, Naoya Kasai, Yoshikazu Takehira, Tohru Kitamura, Yutaka Shiomi
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Patent number: 5308540Abstract: Liquid crystalline compounds having an optionally active .gamma.-lactone ring of the formula: ##STR1## wherein R.sup.1 is a group selected from the group consisting of ##STR2## n and e are each independently 0 or 1; R.sup.3 is an alkyl group having 1 to 15 carbon atoms; R.sup.2 is a group of the formula: --(CO).sub.m --R.sup.4 ; m is 0 or 1; R.sup.4 is hydrogen atom or an alkyl having 1 to 15 carbon atoms; and the symbol * is an asymmetric carbon atom, and an intermediate thereof, and process for the production of the same.Type: GrantFiled: July 16, 1992Date of Patent: May 3, 1994Assignee: Daiso Co., Ltd.Inventors: Kazuhiko Sakaguchi, Naoya Kasai, Yoshikazu Takehira, Tohru Kitamura, Yutaka Shiomi
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Patent number: 5308539Abstract: A ferroelectric liquid crystal composition including: at least one optically active compound of the formula (I): ##STR1## where R.sup.1 and R.sup.2 are, the same or different, a straight or branched chain alkyl group having 1 to 15 carbon atoms, k represents an integer of 0 or 1, and * represents an asymmetric carbon atom; andat least one compound selected from the group consisting of: compounds of the formula (II): ##STR2## where R.sup.3 and R.sup.4 are a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, ##STR3## and ##STR4## each represents ##STR5## X represents --O--, --CO-- or a single bond, m and n are independently an integer of 0 or 1; compounds of the formula (III): ##STR6## where R.sup.5 and R.sup.6 are, the same or different, a straight or branched chain alkyl or alkoxy group having 1-15 carbon atoms, and p is an integer of 0 or 1;said ferroelectric liquid crystal composition exhibiting at least nematic phase, smectic A phase and smectic C phase.Type: GrantFiled: January 17, 1992Date of Patent: May 3, 1994Assignees: Sharp Kabushiki Kaisha, Daiso Co., Ltd.Inventors: Mitsuhiro Koden, Tomoaki Kuratate, Tohru Kitamura, Kazuhiko Sakaguchi, Yutaka Shiomi
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Patent number: 5258719Abstract: A device for detecting a coagulation in a mixed phase container, such as a fluidized bed type olefin polymerization reactor, includes at least one coagulation detecting part mounted on an inner surface of the reactor, and a coagulation detecting circuit for outputting an electrical signal in response to a change in capacitance between a main electrode of the coagulation detecting part and the surrounding inner surface of the reactor. When any coagulation is attached on the inner surface of the mixed phase container, the state of production of the coagulation can be obtained from a change in output signal from the coagulation detecting circuit connected to the coagulation detecting part.Type: GrantFiled: June 5, 1992Date of Patent: November 2, 1993Assignee: Sumitomo Chemical Co., Ltd.Inventors: Yasuhiro Miura, Yutaka Shiomi
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Patent number: 5252687Abstract: A thermosetting resin composition is provide, which contains a compound of ##STR1## wherein substituents R.sub.1 -R.sub.6 each represents a hydrogen atom or a saturated alkyl group having 1-6 carbon atoms, substituents R.sup.7 -R.sup.12 each represents a hydrogen atom, a saturated alkyl group having 1-4 carbon atoms or an alkoxy group having 1-4 carbon atoms, X.sub.a -X.sub.e each represents a hydrogen atom, a chlorine atom or a bromine atome, and the average repeating unit number n denotes a numeral from 0 to 5, and a polyamide compound having two or more maleimide groups and, if desired, a compound of ##STR2## wherein R.sub.1 and R.sub.2 each represents a methyl group or a phenyl group, and R.sub.3 represents a hydrogen atom or a functional group containing an amino group, a glycidyl group or an alicylic epoxy group, l denotes a numeral in the range of 0-500, and m denotes a numeral in the range of 1-500, or ##STR3## wherein R.sub.1 and R.sub.2 each represents a methyl group or a phenyl group, and R.sub.Type: GrantFiled: March 29, 1991Date of Patent: October 12, 1993Assignee: Sumitomo Chemical Company, LimitedInventors: Yutaka Shiomi, Shigeki Naitoh, Yasuhiro Hirano, Kazuo Takebe
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Patent number: 5215678Abstract: A ferroelectric liquid crystal composition comprising at least one compound represented by the formula (I): ##STR1## wherein R.sup.1 and R.sup.2 are, the same or different, a straight-chain or branched-chain alkyl group having 1 to 15 carbon atoms, and each asterisk represents an asymmetric carbon atom, and at least one compound represented by the formula (II): ##STR2## wherein R.sup.3 and R.sup.4 are, the same or different, a straight-chain or branched-chain alkyl group having 1 to 15 carbon atoms, and each asterisk represents an asymmetric carbon atom, and liquid crystal device incorporating same.Type: GrantFiled: December 10, 1991Date of Patent: June 1, 1993Assignees: Sharp Kabushiki Kaisha, Daiso Co.Inventors: Mitsuhiro Koden, Tomoaki Kuratate, Fumiaki Funada, Kazuhiko Sakaguchi, Naoya Kasai, Yoshikazu Takehira, Tohru Kitamura, Yutaka Shiomi
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Patent number: 4980436Abstract: A thermosetting resin composition comprising (i) a polymaleimide compound having at least two maleimide groups in the molecule and (ii) an s-triazine compound having at least two alkenylaryloxy groups in the molecule; a resin-composition for encapsulant comprising said polymaleimide compound, said triazine compound, and an inorganic filler as essential components; and said s-triazine compound.Type: GrantFiled: January 12, 1990Date of Patent: December 25, 1990Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhisa Saito, Kunimasa Kamio, Shuichi Kanagawa, Yutaka Shiomi
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Patent number: 4960860Abstract: The present invention provides an improved epoxy resin composition comprising an epoxy resin and a novel imide compound represented by the formula ##STR1## wherein X represents an --NH.sub.2 group and/or --OH group, Ar.sub.1 and Ar.sub.2 independently represent an aromatic residue, R.sub.1 represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, R.sub.2 represent a hydrogen atom, an alkyl or alkoxy group having from 1 to 20 carbon atoms or hydroxyl group, and each of m and n represents a number of from 0 to 30.Type: GrantFiled: May 31, 1989Date of Patent: October 2, 1990Assignee: Sumitomo Chemical Co., Ltd.Inventors: Yasuhisa Saito, Kunimasa Kamio, Mitsuhiro Shibata, Katsuya Watanabe, Yutaka Shiomi, Youichi Ueda
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Patent number: 4913697Abstract: A thermosetting resin composition comprising (i) a polymaleimide compound having at least two maleimide groups in the molecule and (ii) an s-triazine compound having at least two alkenylaryloxy groups in the molecule; a resin-composition for encapsulant comprising said polymaleimide compound, said traizine compound, and an inorganic filler as essential components; and said s-triazine compound.Type: GrantFiled: December 8, 1988Date of Patent: April 3, 1990Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhisa Saito, Kunimasa Kamio, Shuichi Kanagawa, Yutaka Shiomi
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Patent number: 4909957Abstract: Liquid crystalline compounds having an optically active .gamma.-lactone ring of the formula: ##STR1## wherein R.sup.1 is a group selected from the group consisting of ##STR2## n and e are each independently 0 or 1; R.sup.3 is an alkyl group having 1 to 15 carbon atoms; R.sup.2 is a group of the formula: --(CO).sub.m --R.sup.4 ; m is 0 or 1; R.sup.4 is hydrogen atom or an alkyl having 1 to 15 carbon atoms; and the symbol * is an asymmetric carbon atom, and an intermediate thereof, and process for the production of the same.Type: GrantFiled: September 7, 1988Date of Patent: March 20, 1990Assignee: Daiso Co., Ltd.Inventors: Kazuhiko Sakaguchi, Naoya Kasai, Yoshikazu Takehira, Tohru Kitamura, Yutaka Shiomi
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Patent number: 4908417Abstract: A thermosetting resin composition is prepared by mixing(A) a phenol novolak resin having hydroxy groups and allyl-etherified hydroxy groups,(B) a polymaleimide compound having two or more maleimide groups in the molecule, and(C) at least one silicone resin having the following formula (I); ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, are methyl or phenyl; R.sub.3 and R.sub.4, which may be the same or different, are methyl, phenyl, hydrogen or a group having an amino group or an epoxy group but at least one of R.sub.3 and R.sub.4 is hydrogen or a group having an amino group or an epoxy group; and l and m, which may be the same or different, are a number of 0-400. The thermosetting resin composition of the present invention can be suitably used for encapsulating electric devices, for example, and gives, by curing, a cured resin product of high quality.Type: GrantFiled: May 2, 1989Date of Patent: March 13, 1990Assignee: Sumitomo Chemical Company, LimitedInventors: Yutaka Shiomi, Kunimasa Kamio, Satoru Haraguchi, Shigeki Naitoh
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Patent number: 4888407Abstract: The present invention provides an improved epoxy resin composition comprising an epoxy resin and a novel imide compound represented by the formula ##STR1## wherein X represents an --NH.sub.2 group and/or --OH group, Ar.sub.1 and Ar.sub.2 independently represent an aromatic residue, R.sub.1 represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, R.sub.2 represents a hydrogen atom, an alkyl or alkoxy group having from 1 to 20 carbon atoms or hydroxyl group, and each of m and n represents a number of from 0 to 30.Type: GrantFiled: December 28, 1987Date of Patent: December 19, 1989Assignee: Sumitomo Chemical Co., Ltd.Inventors: Saito Yasuhisa, Kunimasa Kamio, Mitsuhiro Shibata, Katsuya Watanabe, Yutaka Shiomi, Youichi Ueda
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Patent number: 4855339Abstract: An epoxy resin composition comprising (A) an epoxy resin having three or more epoxy groups per a molecule and (B) a reactive oligomer having in its molecule an aromatic residue connected thereto by --O-- or --S-- linkage and having at the terminal of the molecule a phonolic hydroxyl group.Type: GrantFiled: January 19, 1989Date of Patent: August 8, 1989Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhisa Saito, Hisao Takagishi, Hiroshi Nakamura, Kohichi Okuno, Yutaka Shiomi, Kunimasa Kamio
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Patent number: 4808717Abstract: A thermosetting resin composition comprising (i) a polymaleimide compound having at least two maleimide groups in the molecule and (ii) an s-triazine compound having at least two alkenylaryloxy groups in the molecule; a resin-composition for encapsulant comprising said polymaleimide compound, said triazine compound, and an inorganic filler as essential components; and said s-triazine compound.Type: GrantFiled: May 4, 1987Date of Patent: February 28, 1989Assignee: Sumitomo Chemical Company, LimitedInventors: Yasuhisa Saito, Kunimasa Kamio, Shuichi Kanagawa, Yutaka Shiomi