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: 6180224Abstract: An absorber of rays outside the visible region. The absorber includes a base made of a transparent synthetic resin with electroconductive anhydrous zinc antimonate incorporated therein; or a base made of a transparent synthetic resin with a layer formed of a synthetic resin and electroconductive anhydrous zinc antimonate incorporated therein, for absorbing rays outside the visible region, being disposed on a surface of the base; or wherein the layer is formed by depositing electron conductive anhydrous zinc antimonate powder on a surface of the base made of a transparent synthetic resin. The electroconductive anhydrous zinc antimonate can be a powder having a molar ratio of ZnO to Sb2O5 of 0.8 to 1.2 and a primary particle size of 5 to 200 nm. The light transmittances of the absorber are high in the visible region and low in both the ultraviolet and infrared wavelength regions.Type: GrantFiled: July 21, 1998Date of Patent: January 30, 2001Assignee: Nissan Chemical Industries, Ltd.Inventors: Masuhiro Shouji, Hiroki Katono, Takeo Ogihara, Teruo Sakagami, Osamu Tanegashima
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Patent number: 6054503Abstract: Disclosed herein are a plastic lens material having both excellent optical and mechanical properties and having a low specific gravity, and a production process for producing the plastic lens material having excellent various properties and a low specific gravity. The plastic lens material comprises a copolymer obtained by radical-polymerizing a reaction product of a component [A] containing a polyhydric alcohol obtained by subjecting a dimer and/or a trimer of a higher unsaturated fatty acid having 11 to 22 carbon atoms with a component [B] containing an isocyanate compound having a radical-polymerizable unsaturated bond in its molecule together with a copolymerizable monomer [C].Type: GrantFiled: December 8, 1998Date of Patent: April 25, 2000Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Yukio Ichikawa, Teruo Sakagami
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Patent number: 5820779Abstract: A polymeric optical low-pass filter of the birefringent type is provided which is lightweight and small, and which can be easily produced. Also provided are a polymeric optical low-pass filter device including the polymeric optical low-pass filter; and a composite optical filter including the polymeric optical low-pass filter. The optical low-pass filter comprises an optically anisotropic polymer film in which the displacement distance S between the ordinary ray and the extraordinary ray represented by the following formula is 1-70 .mu.m:S={(b.sup.2 -a.sup.2)/2c.sup.2 }.multidot.sin 2.phi.e,wherein a=1/n.sub.e, b=1/n.sub.0, c.sup.2 =a.sup.2 sin.sup.2 .phi.+b.sup.2 cos.sup.2 .phi., n.sub.e is the extraordinary-ray refractive index, n.sub.0 is the ordinary-ray refractive index, .phi. is the angle formed between the normal at the plane of incidence of light from a subject and the optic axis of the polymer film, and e is the thickness of the polymer film.Type: GrantFiled: October 5, 1995Date of Patent: October 13, 1998Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Dainippon Ink and Chemicals, Inc.Inventors: Masuhiro Shouji, Takeo Ogihara, Hiroki Katono, Teruo Sakagami, Hiroshi Hasebe, Haruyoshi Takatu
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Patent number: 5793544Abstract: A component optical filter and a process for production of the filter includes the steps of arranging a pair of transparent plates, at least one of which has an optical low-pass filtering function, to oppose each other with a gap therebetween and filling the gap with a monomer composition of the formula PO(OH).sub.n R.sub.3 -n wherein R is a polymerizable functional group represented by CH.sub.2 .dbd.CXCOO(C.sub.2 H.sub.4 O).sub.m- and (c) a metallic compound composed of a copper compound, and then subjecting the monomer composition to a polymerization treatment. The result is a laminated composite filter having at least one optical low-pass filter and an intermediate layer forming a luminosity factor-compensating filter.Type: GrantFiled: November 6, 1995Date of Patent: August 11, 1998Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Takeo Ogihara, Hiroki Katono, Masuhiro Shouji, Teruo Sakagami
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Patent number: 5777000Abstract: Disclosed is a plastic lens formed of a crosslinked polymer obtained by polymerizing or copolymerizing a monomer composition comprising as essential component the following component (A) and/or the following component (B), and optionally a component (C) composed of at least one monomer copolymerizable with the essential component comprising the component (A) and/or the component (B):Component (A):an ester obtained from (1)(a) a diol which is obtained by reducing a dimer of an unsaturated fatty acid having 16-18 carbon atoms and/or (b) a diol which is obtained by reducing a dimer of a lower alcohol ester of an unsaturated fatty acid having 16-18 carbon atoms, and (2) acrylic acid or methacrylic acid; andComponent (B):an ester obtained from (1)(a) a triol which is obtained by reducing a trimer of an unsaturated fatty acid having 16-18 carbon atoms and/or (b) a triol which is obtained by reducing a trimer of a lower alcohol ester of an unsaturated fatty acid having 16-18 carbon atoms, and (2) acrylic acid or metType: GrantFiled: October 16, 1996Date of Patent: July 7, 1998Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Akira Saito
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Patent number: 5759448Abstract: Disclosed herein is a plastic optical material, which has excellent glare-proofness and transparency and is low in the degree of coloring.The plastic optical material of the invention comprises a polymer containing a phosphate group and a trivalent neodymium ion therein, wherein the polymer further contains at least one metal ion selected from the group consisting of a trivalent praseodymium ion and a trivalent holmium ion.The phosphate group may preferably be chemically bonded to a molecular structure constituting the polymer. In particularly, the polymer may preferably be a copolymer obtained by copolymerizing a monomer represented by the following formula I:PO(OH).sub.n R.sub.3-nwherein R means a polymerizable functional group represented by the formula: ##STR1## in which X denotes a hydrogen atom or a methyl group, and m is an integer of 0-5, and n is 1 or 2, and at least one monomer copolymerizable therewith.Type: GrantFiled: October 25, 1996Date of Patent: June 2, 1998Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Hiroki Katono, Masuhiro Shouji, Takeo Ogihara, Teruo Sakagami
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Patent number: 5691838Abstract: Disclosed herein is an infrared-blocking optical filter having optical properties that the transmittance to rays in a visible region is excellent while rays in a near infrared region, particularly, in a wavelength range longer than 1200 nm are cut off or attenuated with high efficiency. The infrared-blocking optical filter includes a transparent substrate and either of the following infrared-blocking film (A) and (B) provided on a surface of the transparent substrate. Film (A): an infrared-blocking film formed on a synthetic resin in which fine powder of metal oxide material composed of indium oxide and/or tin oxide is dispersed; and Film (B): an infrared-blocking film formed of a deposit of a metal oxide material composed of indium oxide and/or tin oxide. The infrared-blocking film may be formed on a transparent support member to constitute an infrared-blocking composite film which is provided on a surface of the transparent substrate to form an infrared-blocking optical filter.Type: GrantFiled: June 6, 1995Date of Patent: November 25, 1997Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Masuhiro Shouji, Hiroki Katono, Takeo Ogihara, Teruo Sakagami
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Patent number: 5672655Abstract: Disclosed herein are plastic optical materials having properties that rays in a specific visible range are absorbed, being low in specific gravity and easy to conduct processing or machining, and having excellent glare-proofness. One of the plastic optical material comprises an acrylic polymer containing a specific phosphate group represented by the formula PO(OH).sub.n -- (n being 1 or 2) of 0.5-60%, and a metal ion component comprising a neodymium ion of 0.04-10 parts based on 100 parts of the acrylic polymer, and has properties that rays in a wavelength range about 580 nm are absorbed. Another plastic optical material comprises 100 parts of the same acrylic polymer, and 0.1-12 parts of a metal ion component composed of a manganese ion in a predominant amount and a neodymium ion, and has properties that rays in wavelength ranges of 400-500 nm and 555-605 nm are absorbed with high efficiency.This plastic optical material is particularly suitable for use in plastic lenses for sunglasses.Type: GrantFiled: August 30, 1995Date of Patent: September 30, 1997Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Hiroki Katono, Masuhiro Shouji, Takeo Ogihara, Teruo Sakagami
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Patent number: 5611965Abstract: Disclosed herein is a plastic optical filter which has a combined optical function that it has an effect of effectively blocking or attenuating rays in the wavelength range of a near infrared region and excellent luminosity factor-compensating ability and is provided with an optical low-pass filtering function, and is low in specific gravity and hygroscopicity, free from devitrification with time and easy to conduct its processing or machining and polishing treatment.This plastic optical filter includes a filter base formed of a plastic material comprising a copolymer obtained by copolymerizing a monomer represented by the following formula I:PO(OH).sub.n R.sub.3-n Iwherein R means a polymerizable functional group represented by the following formula II:CH.sub.2 .dbd.CXCOO(C.sub.2 H.sub.4 O).sub.Type: GrantFiled: August 28, 1995Date of Patent: March 18, 1997Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Masuhiro Shouji, Takeo Ogihara, Hiroki Katono, Teruo Sakagami
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Patent number: 5567778Abstract: Disclosed herein is an optical filter comprising: a resin material obtained by copolymerizing a monomer represented by the following formula (I) and a monomer copolymerizable therewith; and a metallic compound mainly composed of a copper compound;PO(OH).sub.n R.sub.3-n (I)wherein R represents ##STR1## (wherein X represents a hydrogen atom or a methyl group, and m is an integer of 0 to 5), and n is 1 or 2.Type: GrantFiled: April 5, 1995Date of Patent: October 22, 1996Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Takeo Ogihara, Yasufumi Fujii, Hiroki Katono
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Patent number: 5466755Abstract: Disclosed herein is an optical filter comprising: a resin material obtained by copolymerizing a monomer represented by the following formula (I) and a monomer copolymerizable therewith; and a metallic compound mainly composed of a copper compound;PO(OH).sub.n R.sub.3-n (I)wherein R represents ##STR1## (wherein X represents a hydrogen atom or a methyl group, and m is an integer of 0 to 5), and n is 1 or 2.Type: GrantFiled: March 14, 1994Date of Patent: November 14, 1995Assignee: Kureha, Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Takeo Ogihara, Yasufumi Fujii, Hiroki Katono
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Patent number: 5288844Abstract: Disclosed herein is a high-refractive index plastic optical material comprising a copolymer obtained by subjecting a mixture composed of a component A consisting of a dithiol compound represented by the formula I: ##STR1## wherein n stands for an integer of 1-3, and a component B consisting of divinylbenzene, said mixture containing both components in such a manner that the proportion of the component A to the component B is 0.25-3.5 in terms of weight ratio, to addition polymerization and having a refractive index of at least 1.63 and an Abbe's number of at least 27. The optical material has excellent optical properties that the refractive index is high and the dispersion is low, and moreover possesses good physical properties.Type: GrantFiled: July 2, 1992Date of Patent: February 22, 1994Inventor: Teruo Sakagami
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Patent number: 5086140Abstract: An optical material of a high refractive index is formed of a copolymer obtained by polymerizing 10-90 wt. % of a monomer represented by the following formula (I) and 90-10 wt. % of a monomer copolymerizable with the first-mentioned monomer. ##STR1## wherein R is a hydrogen atom or methyl group.Type: GrantFiled: November 13, 1990Date of Patent: February 4, 1992Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Hideaki Doi, Teruo Sakagami
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Patent number: 5017698Abstract: Disclosed herein is a photochromic compound comprising a spirooxazine compound represented by the following general formula (I): ##STR1## wherein R.sup.1 means an alkyl, allyl or alkoxyalkyl group, or a substituted or unsubstituted aralkyl or aryloxyalkyl group, R.sup.2 and R.sup.3 individually denote a substituted or unsubstituted alkyl group, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 stand individually for a hydrogen or halogen atom, or an alkyl, alkoxy, hydroxy, alkoxyalkyl, or substituted or unsubstituted amino group. A photochromic composition comprising the photochromic compound and a phenol derivative, fluorine-containing alcohol or hindered amine type light stabilizer is also disclosed.Type: GrantFiled: May 26, 1989Date of Patent: May 21, 1991Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Katsuichi Machida, Akira Saito, Teruo Sakagami
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Patent number: 4975223Abstract: An optical material of a high refractive index is formed of a copolymer obtained by copolymerizing 3-40 wt. % of 4-isopropenylbiphenyl, 30-97 wt. % of a monofunctional aromatic monomer represented by the following formula (I) or (II) and 0-67 wt. % of another monomer copolymerizable with 4-isopropenylbiphenyl and the monofunctional aromatic monomer. ##STR1## wherein R means a hydrogen atom or methyl group, X denotes ##STR2## in which n stands for an integer of 0-3, Y is a halogen atom other than a fluorine atom, or a methyl, hydroxyl or methoxy group, and m stands for an integer of 0-3, with the proviso that Y may be different from each other when m is 2 or 3.Type: GrantFiled: February 3, 1989Date of Patent: December 4, 1990Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Hideaki Doi, Teruo Sakagami
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Patent number: 4959431Abstract: An optical material formed of a copolymer is disclosed. The copolymer is obtained by polymerizing a monomer composition composed of a particular N-substituted trifunctional monomer having a triazine ring structure and a monomer copolymerizable with the isocyanurate. Where the copolymerizable monomer is a specific aliphatic bifunctional monomer, the monomer composition additionally contains a further monomer which is copolymerizable with the aforementioned components and contains at least one ethylenically-unsaturated group.Type: GrantFiled: November 14, 1988Date of Patent: September 25, 1990Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Nobuhiro Watanabe, Teruo Sakagami
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Patent number: 4931523Abstract: A plastic lens is made of a copolymer which has been obtained by copolymerizing 10-80 wt. % of a first monomer represented by the general formula (I) given below and 20-90 wt. % of a second monomer copolymerizable with the first monomer. General formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 mean individually a hydrogen atom or methyl group, and n and m denote integers of 0-4 in total.Type: GrantFiled: May 4, 1988Date of Patent: June 5, 1990Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Nobuhiro Watanabe, Teruo Sakagami
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Patent number: 4826284Abstract: A resin-made heat-resistant optical fiber is formed of a core of a hardened thermosetting resin and a cladding of a polymer or copolymer having a refractive index smaller by at least 1%, preferably, at least 3% than that of the core. The thermosetting resin is selected from the group consisting of epoxy resins, phenol resins and urethane resins. The polymer or copolymer may preferably be a thermoplastic organic resin.Type: GrantFiled: March 6, 1987Date of Patent: May 2, 1989Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Yasufumi Fujii
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Patent number: 4784915Abstract: A polymer piezoelectric film comprising a poled film of a vinylidene fluoride copolymer having a high molecular weight as defined by an inherent viscosity within a specific range comprising 40 to 90 mol. % of vinylidene fluoride and 10 to 60 mol. % of trifluoroethylene. Such a high molecular weight vinylidene fluoride copolymer can give a preferable state of molecular arrangement during film formation, particularly preferably formation by casting, to provide a film excellent in piezoelectric characteristic and secondary processing characteristic.Type: GrantFiled: August 15, 1984Date of Patent: November 15, 1988Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Kenichi Nakamura, Naohiro Murayama
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Patent number: 4775590Abstract: A resin-made optical fiber is composed of a core of a polymer or copolymer obtained from a polymerizable monomer, which contains at least 1 wt. % of a crosslinkable monomer, and a cladding of a polymer of copolymer having a refractive index smaller than the core. The optical fiber is fabricated by filling a polymerizable monomer into a hollow fiber like cladding material, which is adapted to form a cladding and is made of a polymer or copolymer, and then placing the resultant composite material under polymerizing conditions to polymerize the polymerizable monomer. The latter step may preferably be carried out by causing the composite material to travel continuously in the direction of its length into a polymerization zone where conditions for the polymerization of the polymerizable monomer are satisfied, whereby the polymerizable monomer is successively polymerized to form a core having a refractive index greater than the cladding.Type: GrantFiled: July 21, 1986Date of Patent: October 4, 1988Assignee: Kureha Kagaku Kogyo Kabushiki KaishaInventors: Teruo Sakagami, Naohiro Murayama