Patents by Inventor Teruo Sakagami
Teruo Sakagami 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: 4756973Abstract: A photochromic lens is composed of a lens member made of a lens resin; and a photochromic layer applied on at least one side of the lens member and formed of a resin of a three-dimensional network structure. The layer-forming resin contains a spirooxazine compound represented by the following general formula (I): ##STR1## wherein R.sub.1 means a hydrogen or halogen atom or a cyano, C.sub.1-6 alkyl or C.sub.1-6 alkoxy group, and R.sub.2 denotes a C.sub.1-6 alkyl group, --CH.sub.2).sub.n COOH, --CH.sub.2).sub.n CN, substituted arylalkyl group or --CH.sub.2).sub.n COOR in which R is a C.sub.1-6 alkyl group and n stands for an integer of 1-4. The layer-forming resin may additionally contain a phenol resin and/or a phenolic compound. A hard coat layer may optionally be applied on the surface of the photochromic layer.Type: GrantFiled: July 7, 1986Date of Patent: July 12, 1988Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Katsuichi Machida, Yasufumi Fujii, Noriyuki Arakawa, Naohiro Murayama
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Patent number: 4704006Abstract: A halogen-containing resin lens material, having a refractive index of n.sub.D =1.55 or higher, an Abbe number of 27 or higher and good dyeable property and comprising a copolymer containing 10 to 90 wt. % of a monomer (I) represented by the formula (I) shown below: ##STR1## wherein: R.sup.1 represents hydrogen or CH.sub.3 group; X.sup.1 a halogen atom except for fluorin; and p the number of substituted halogens which is an integer selected from 1 to 5, and n is an integer selected from 1 to 4, R.sup.1 existing in plural number and being either identical or different, X.sup.1 when existing in plural number being either identical or different and 10 to 70 wt. % of a crosslinking monomer having two or more polymerizable functional groups (the percentages being based on the copolymer weight).Type: GrantFiled: January 29, 1986Date of Patent: November 3, 1987Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Yasufumi Fujii, Naohiro Murayama
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Patent number: 4650833Abstract: Disclosed herein is a thin transparent polytetrafluoroethylene film having:(1) a film thickness of 0.1-100 .mu.m;(2) a parallel light transmittance of at least 70% (as measured in accordance with JIS K 7105); and(3) a tensile strength of at least 1 kg/mm.sup.2 (as measured in accordance with JIS K 6887 except for the use of a pulling speed of 10 mm/min.).The film is produced by fluorinating with a fluorine gas a thin film formed from a solution of a fluoroethylene polymer having an inherent viscosity of at least 2.5 dl/g (as measured at a temperature of 30.degree. C. and a solution concentration of 0.4 g/dl) in accordance with the casting process and having a thickness of 0.1-100 .mu.m.Type: GrantFiled: February 25, 1985Date of Patent: March 17, 1987Assignee: Kureha Chemical Industry Co.Inventors: Teruo Sakagami, Noriyuki Arakawa, Naohiro Murayama
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Patent number: 4644025Abstract: Compositions each comprising a copolymer of a specific allylic or (meth)acrylic compound of an iodine-substituted benzoic acid derivative and a comonomer have a refractive index n.sub.D.sup.20 of at least 1.58 and an Abbe's number of at least 28 and are excellent starting materials for the production of high quality lenses.Type: GrantFiled: June 19, 1985Date of Patent: February 17, 1987Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Yasufumi Fujii, Naohiro Murayama
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Patent number: 4615943Abstract: A transparent film of a vinylidene fluoride copolymer, comprising a dry film of a vinylidene fluoride copolymer having a parallel light transmittance of 85% or higher at a film thickness of 30 microns. The transparent film is obtained by forming a mixture of a vinylidene fluoride copolymer having a specifically high molecular weight with a solvent into a film, preferably by casting, and evaporating off the solvent.Type: GrantFiled: December 20, 1985Date of Patent: October 7, 1986Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Noriyuki Arakawa, Naohiro Murayama
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Patent number: 4578445Abstract: A lens material having a refractive index n.sub.D.sup.20 of at least 1.57 or more and an Abbe's number .nu. of at least 30, comprising: a copolymer comprising (I) 10 to 85% by weight of a halogen-containing monomer represented by the following formula (1), (II) 15 to 90% by weight of a halogen-containing monomer represented by the following formula (2), and (III) 0 to 20% by weight of a monomer copolymerizable with the above mentioned monomers, the composition of the copolymer being based on the total quantity of the monomers (I), (II), and (III): ##STR1## wherein: D represents ##STR2## in which n represents an integer selected from the group consisting of 0, 1, and 2; each R.sup.1 represents hydrogen or a methyl group; Y represents CHOH; and r represents 0 or 1; each of X.sup.1 and X.sup.Type: GrantFiled: March 27, 1985Date of Patent: March 25, 1986Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Yasufumi Fujii, Naohiro Murayama
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Patent number: 4572905Abstract: Disclosed herein are a porous substrate for analyzing hydrophilic substances of low molecular weight, having an exclusive molecular weight of less than 30,000, comprising a cross-linked copolymer having methylol groups, the copolymer being made of a monomer of styrenes and a cross-linking agent copolymerizable with the monomer, the outer surface of the porous substrate being hydrophilic and the pore surface thereof being hydrophobic, and a process for producing the same.Type: GrantFiled: May 8, 1984Date of Patent: February 25, 1986Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Noriyuki Arakawa
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Patent number: 4571390Abstract: Disclosed herein are a porous substrate capable of adsorbing protein, having an exclusive molecular weight of at least 30,000, comprising a cross-linked copolymer having methylol groups, the copolymer being made of a monomer of styrenes and a cross-linking agent copolymerizable with the monomer, the outer surface of the porous substrate being hydrophilic and the pore surface thereof being hydrophobic, and a process for producing the same.Type: GrantFiled: May 8, 1984Date of Patent: February 18, 1986Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Masuhiro Shoji, Noriyuki Arakawa, Naohiro Murayama
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Patent number: 4554335Abstract: The dielectric polymer materials are composed of about 25 to 90 mol % of vinylidene fluoride, about 5 to 70 mol % of ethylene trifluoride, and about 1 to 13 mol % of ethylene chloride trifluoride. The dielectric polymer materials possess a high dielectric constant and do not vary in dielectric constants with temperatures.Type: GrantFiled: February 29, 1984Date of Patent: November 19, 1985Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Noriyuki Arakawa, Yoshikichi Teramoto, Kenichi Nakamura
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Patent number: 4543294Abstract: A copolymer of 20 to 33 mol. % vinylidene fluoride, 15 to 45 mol. % of ethylene and 30 to 65 mol. % of tetrafluoroethylene gives a dielectric material having a large dielectric constant of 4.0 or above and a small dielectric dissipation factor (tan .delta.) of 0.8% or below, and is suitable for use as a condenser film.Type: GrantFiled: May 31, 1984Date of Patent: September 24, 1985Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Noriyuki Arakawa, Haruko Kakutani
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Patent number: 4543293Abstract: Disclosed is a polarized, shaped material comprising a copolymer of 40 to 87 mol % of vinylidene fluoride, 10 to 40 mol % of trifluoroethylene and 3 to 20 mol % of vinyl fluoride.Type: GrantFiled: May 20, 1983Date of Patent: September 24, 1985Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Ken'ichi Nakamura, Teruo Sakagami, Yoshikichi Teramoto, Hiroshi Obara
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Patent number: 4504631Abstract: The photoresist material comprises a polymer having chloromethyl groups introduced therein and containing 2-isopropenylnaphthalene as one component, an average substitution degree of the chloromethyl groups based on the polymer is within a range of 0.2 to 5.The photoresist material has a high glass transition point, a high sensitivity to radiation and an excellent dry etching resistance, whereby it is suitably used for the manufacture of a semiconductor element using radiation and provides a good resolution on etching.Type: GrantFiled: May 31, 1983Date of Patent: March 12, 1985Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Hideaki Doi, Kenichi Kokubun, Teruo Sakagami, Naohiro Murayama
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Patent number: 4497710Abstract: A substrate for liquid chromatography comprising a spherical particle of highly cross-linked polymer which is produced from (a) 100 parts by weight of a monomer of vinyl ester, acrylate or methacrylate, these esters having a long alkyl chain, if desired, together with a comonomer copolymerizable with the monomer and (b) 10 to 80 parts by weight of a cross-linking agent copolymerizable with the monomer and having at least two functional groups, and a process for isolating and purifying a fat-soluble substance, for instance, a lower alkyl ester of eicosapentaenoic acid or docosahexaenoic acid by means of the liquid chromatography on the substrate.Type: GrantFiled: September 30, 1982Date of Patent: February 5, 1985Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Masakatsu Wagu, Shoichiro Hayashi, Naohiro Murayama, Teruo Sakagami
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Patent number: 4443366Abstract: A mixture of water-soluble substances, particularly a mixture of proteins, a mixture of enzymes or a mixture of water-soluble vitamins, is fractionated by subjecting an aqueous solution of said mixture of water-soluble substances to gel chromatography through a filter bed of a cross-linked gel copolymer of vinylpyrrolidone and a cross-linking agent having a triazine ring system of the formula (I) or (II): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and each radical is selected from the group consisting of --CH.sub.2 --CH.dbd.CH.sub.2, --CH.sub.2 --C.tbd.CH and --CH.sub.2 --C(CH).sub.2, in a diluent.Type: GrantFiled: March 29, 1982Date of Patent: April 17, 1984Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Noriyuki Arakawa, Naohiro Murayama
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Patent number: 4428873Abstract: An electrooptical solid element comprises a formed resin composition comprising a low molecular polar substance having a Kerr type electrooptical effect, and an organic polymer substance compatible with the low molecular polar substance. The formed resin composition is prepared by a method such as melt mixing on rollers, or dissolution in a common solvent followed by evaporation of the solvent. This formed resin composition is prepared in various shapes such as a polygon, a film, a prism and a polygonal pole. At least a pair of electrodes are provided on the surfaces of the formed resin composition, and further at least one of the electrodes may can be made of a transparent material.Type: GrantFiled: August 27, 1981Date of Patent: January 31, 1984Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Naohiro Murayama, Teruo Sakagami, Masuhiro Shoji
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Patent number: 4413090Abstract: A cyanoethylated resin to which adhesive properties and high dielectric constant are imparted by cyanoethylating a C.sub.2 -C.sub.4 olefin-vinyl alcohol copolymer, which is suitable for use as a dielectric material and an adhesive.Type: GrantFiled: April 6, 1982Date of Patent: November 1, 1983Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Masuhiro Shoji, Teruo Sakagami, Naohiro Murayama
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Patent number: 4314032Abstract: A crosslinked polyvinyl alcohol gel having vinyl alcohol units and crosslinking units having the formula ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are respectively the same or different and selected from the group consisting of --CH.sub.2 --CH.dbd.CH.sub.2, --CH.sub.2 --CH.tbd.CH and ##STR2## as a packing for a gel chromatography.Type: GrantFiled: October 17, 1979Date of Patent: February 2, 1982Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Naohiro Murayama, Teruo Sakagami
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Patent number: 4294677Abstract: A method for electrodepositing a protein by electrophoresis onto an ion-exchange membrane from a liquid in which the protein is dissolved or is dispersed in suspension, and an apparatus for the electrodepositing are disclosed.Type: GrantFiled: September 12, 1979Date of Patent: October 13, 1981Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Tadaaki Kato, Toru Hirai, Naohiro Murayama
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Patent number: 4246091Abstract: A process for the electronic treatment of alkali halide. Use is made of a cation exchange membrane having as its ion exchange radicals, sulfonic acid radicals. This membrane is treated with primary to tertiary monoamine or its salt or quatary ammonium salt and then heat-treated at a temperature higher than 100.degree. C. and lower than melting point of the reaction product and then subjected to drying, so as to improving the cation-selecting performance of the membrane and to increase its current efficiency.Type: GrantFiled: March 6, 1978Date of Patent: January 20, 1981Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Naohiro Murayama, Makoto Fukuda, Sirou Sujuki, Teruo Sakagami
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Patent number: 4212712Abstract: This invention relates to an apparatus for the electrolytic treatment of alkali halide solution in a three chamber type electrolytic bath assembly comprising an anodic chamber, an intermediate chamber and a cathodic chamber arranged one after another in series. Each chamber is from its neighboring chamber by means of a cationic permselective membrane. The apparatus is characterized, according to this invention, in that the first one of the membranes separating the intermediate and anodic chambers is made of a fluorine-containing resin, while the second membrane separating the intermediate and cathodic chambers includes, as its main ion exchange radial, a pendant type phenolic radical or derivative thereof. The inventive process, which utilizes the above-described apparatus is characterized in that it utilizes a caustic alkali concentration in the intermediate chamber which ranges from about 10-20 wt.Type: GrantFiled: May 12, 1978Date of Patent: July 15, 1980Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Naohiro Murayama, Makoto Fukuda, Teruo Sakagami, Shirou Suzuki, Yoshikazu Kokubu, Toshio Enoki