Patents by Inventor Toru Yashiro
Toru Yashiro 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: 7829198Abstract: An oil-repellent coating layer 2 is disposed on both surfaces of a lens material 1 consisting of glass or a plastic. Furthermore, a minute particle layer 3 in which minute particles of a metal oxide or minute particles of a fluoride, or both, are dispersed is formed on the surface of the oil-repellent coating layer 2, and a resin layer 4 consisting of an organic compound is disposed on the surface of the minute particle layer 3. Since the adhesion between the resin layer 4 and the two-sided adhesive tape that is used when the lens is set in the lens edging machine is good, axial shifting tends not to occur during working.Type: GrantFiled: February 28, 2006Date of Patent: November 9, 2010Assignee: Nikon-Essilor Co., LtdInventors: Masanobu Urabe, Tsukasa Monma, Osamu Abe, Toru Yashiro
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Publication number: 20090213322Abstract: An oil-repellent coating layer 2 is disposed on both surfaces of a lens material 1 consisting of glass or a plastic. Furthermore, a minute particle layer 3 in which minute particles of a metal oxide or minute particles of a fluoride, or both, are dispersed is formed on the surface of the oil-repellent coating layer 2, and a resin layer 4 consisting of an organic compound is disposed on the surface of the minute particle layer 3. Since the adhesion between the resin layer 4 and the two-sided adhesive tape that is used when the lens is set in the lens edging machine is good, axial shifting tends not to occur during working.Type: ApplicationFiled: February 28, 2006Publication date: August 27, 2009Inventors: Masanobu Urabe, Tsukasa Monma, Osamu Abe, Toru Yashiro
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Patent number: 6469963Abstract: An optical recording medium which includes a PMA area, a TOC area, program area, an area that includes a user area and lead-out area. A portion of the PMA area, which relates to the program area, is in a recorded state and the TOC area is in an unrecorded state. Alternatively, the PMA may be in an unrecorded state. In addition, a password may be recorded in a portion of an information area. A method of erasing the medium and a system for reading and recording information are also provided.Type: GrantFiled: September 7, 2000Date of Patent: October 22, 2002Assignee: Ricoh Company, Ltd.Inventors: Yasuo Sawada, Toru Yashiro, Eiji Noda
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Patent number: 6137769Abstract: An optical recording medium which includes a PMA area, a TOC area, program area, an area that includes a user area and lead-out area. A portion of the PMA area, which relates to the program area, is in a recorded state and the TOC area is in an unrecorded state. Alternatively, the PMA may be in an unrecorded state. In addition, a password may be recorded in a portion of an information area. A method of erasing the medium and a system for reading and recording information are also provided.Type: GrantFiled: February 2, 1999Date of Patent: October 24, 2000Assignee: Ricoh Company, Ltd.Inventors: Yasuo Sawada, Toru Yashiro, Eiji Noda
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Patent number: 6045971Abstract: An optical information recording medium includes a substrate, and a light absorption layer formed thereon which includes a phthalocyanine compound (I), a phthalocyanine compound (II) and a phthalocyanine compound (III) as specified in the specification. This optical information recording medium can be produced by providing the light absorption layer, directly or via an intermediate layer, on a substrate with information pits and/or guide grooves being formed on the surface thereof by film formation coating, providing a light reflection layer, directly or via an intermediate layer, on the light absorption layer by vacuum film formation, and then providing a protective layer on the light reflection layer.Type: GrantFiled: February 5, 1998Date of Patent: April 4, 2000Assignee: Ricoh Company, Ltd.Inventor: Toru Yashiro
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Patent number: 6043355Abstract: A phthalocyanine compound of formula (I): ##STR1## wherein FIGS. 1 to 16 around the phthalocyanine skeleton indicate the positions of carbon atoms in each benzene ring thereof; an oxygen atom is bonded to the carbon atom with position 1 or 4, to the carbon atom with position 5 or 8, to the carbon atom with position 9 or 12, and to the carbon atom with position 13 or 16; R.sup.1 is a fluorine-atom substituted alkyl group; R.sup.2 is an unsubstituted phenyl group or an alkyl-group-substituted phenyl group; R.sup.3 is an unsubstituted alkyl group, a fluorine-atom substituted alkyl group or a hydrogen atom; and M represents Zn, Cu or Ni.Type: GrantFiled: February 5, 1998Date of Patent: March 28, 2000Assignees: Ricoh Company, Ltd., Yamada Chemical Co., Ltd.Inventors: Toru Yashiro, Masatoshi Taniguchi, Toshiro Narizuka, Hiroaki Tomita
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Patent number: 5968708Abstract: An optical recording medium has a substrate, and a light absorbing layer serving as a recording layer formed on the substrate. The light absorbing layer contains a metallo-phthalocyanine compound of formula (I): ##STR1## wherein M is Mn, Fe, Co, Zn or Cd; and either A.sup.1 or A.sup.2, either A.sup.3 or A.sup.4, either A.sup.5 or A.sup.6, and either A.sup.7 or A.sup.8 is --OR group or --SR group in which R is an aliphatic, aromatic or alicyclic hydrocarbon group, and the other is hydrogen; and a nitrogen-containing compound selected from the group consisting of an amino compound, an imino compound and an azo compound, each of which may have a substituent or form a ring.Type: GrantFiled: January 16, 1997Date of Patent: October 19, 1999Assignees: Ricoh Company, Ltd., Yamada Chemical Co., Ltd.Inventors: Toru Yashiro, Yutaka Ueda
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Patent number: 5932721Abstract: A phthalocyanine compound of formula (1): ##STR1## wherein FIGS. 1 to 16 around the phthalocyanine skeleton indicate the positions of carbon atoms, an oxygen atom is bonded to the carbon atom with position 1 or 4, to the carbon with position 5 or 8, to the carbon atom with position 9 or 12, and to the carbon atom with position 13 or 16, R.sup.1 is a fluorine-atom substituted alkyl group, R.sup.2 is an unsubstituted phenyl group or an alkyl-group-substituted phenyl group, R.sup.3 is an unsubstituted alkyl group, a fluorine-atom substituted alkyl group or a hydrogen atom, and M represents VO or TiO.Type: GrantFiled: March 25, 1997Date of Patent: August 3, 1999Assignee: Ricoh Company, Ltd.Inventors: Toru Yashiro, Masatoshi Taniguchi, Toshiro Narizuka
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Patent number: 5882757Abstract: An optical information recording medium includes a substrate, and a light absorption layer formed thereon which includes a phthalocyanine compound (I) having a thermal decomposition temperature in a range of 250.degree. C. to 350.degree. C., measured by thermogravimetry with a temperature elevation rate of 10.degree. C. and a phthalocyanine compound (II) having a thermal decomposition temperature in a range of 350.degree. C. to 450.degree. C., measured by thermogravimetry with a temperature elevation rate of 10.degree. C. This optical information recording medium can be produced by providing the light absorption layer, directly or via an intermediate layer, on a substrate with information pits and/or guide grooves being on the surface thereof by film formation coating, providing a light reflection layer, directly or via an intermediate layer, on the light absorption layer by vacuum film formation, and providing a protective layer on the light reflection layer.Type: GrantFiled: March 25, 1997Date of Patent: March 16, 1999Assignee: Ricoh Company, Ltd.Inventor: Toru Yashiro
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Patent number: 5789138Abstract: An optical recording medium is composed of a substrate and a light absorbing layer serving as recording layer formed on the substrate. The light absorbing layer includes a phthalocyanine compound and a compound having a group which can be coordinated to the phthalocyanine compound.Type: GrantFiled: November 20, 1996Date of Patent: August 4, 1998Assignee: Ricoh Company, Ltd.Inventor: Toru Yashiro
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Patent number: 5580696Abstract: An optical recording medium has a substrate, and a right absorbing layer serving as a recording layer formed of the substrate. The light absorbing layer contains a metallo-phthalocyanine compound of formula (I): ##STR1## wherein M is Mn, Fe, Co, Zn or Cd; and either A.sup.1 or A.sup.2, either A.sup.3 or A.sup.4, either A.sup.5 or A.sup.6, and either A.sup.7 or A.sup.8 is --OR group or --SR group in which R is a group including --N.dbd. or --N<, and the other is hydrogen.Type: GrantFiled: April 19, 1995Date of Patent: December 3, 1996Assignees: Ricoh Company, Ltd., Yamada Chemical Co., Ltd.Inventor: Toru Yashiro
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Patent number: 5532033Abstract: An optical information recording medium is disclosed which includes a substrate, and an information recording layer provided on the substrate and containing a specific metallophthalocyanine having a substituent which prevents the molecular association of the metallophthalocyanine and which contains at least one of O, S and N atoms.Type: GrantFiled: April 19, 1995Date of Patent: July 2, 1996Assignees: Ricoh Company, Ltd., Yamada Chemical Co., Ltd.Inventor: Toru Yashiro
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Patent number: 5462806Abstract: A plastic lens comprising a plastic lens base material having provided on at least one surface thereof (1) a primer layer comprising a resin containing at least one organosilicon compound represented by the following general formula (I):R.sup.1.sub.m R.sup.2.sub.n Si(OR.sup.3).sub.4-m-n (I)wherein R.sup.1 and R.sup.2 each independently represents an alkyl group, an alkenyl group, an aryl group, an aralkyl group or a halogen atom, R.sup.3 represents an alkyl group, an acyl group, an aryl group or an aralkyl group, and m and n are each 0 or 1, or a hydrolyzate thereof, (2) a hard coat layer and, optionally, (3) a reflection preventing layer in this order is disclosed. The plastic lens according to the present invention is characterized by having an excellent scratch resistance even though the lens has the primer layer, and also having an excellent impact resistance even though the lens has the hard coat layer.Type: GrantFiled: May 17, 1994Date of Patent: October 31, 1995Assignee: Nikon CorporationInventors: Toshio Konishi, Toshihiko Horibe, Toru Yashiro, Kouji Watanabe, Toshiya Shuin
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Patent number: 5316814Abstract: An optical information recording medium including a ROM area and a recordable area is composed of a light-transmitting substrate with prepits and/or guide grooves formed on the surface thereof, a light absorption layer serving as a recording layer which is composed of a dye as the main component overlaid on the light-transmitting substrate, and a light reflection layer which is composed of metallic film overlaid on the light absorption layer. The light absorption layer of this optical information recording medium is formed on the substrate by coating a solution composed of a dye and a solvent of a mixture of a fluoridated alcohol of formula (I) and an alcohol of formula (II):A--CH.sub.2 OH (I)wherein A represents CF.sub.3 --or H(CF.sub.2 --CF.sub.2).sub.l --in which l is an integer of 1 to 3; andHO--CH.sub.2 CH.sub.2 --OR (II)wherein R represents C.sub.n H.sub.2n+1 --, ##STR1## H, or C.sub.m H.sub.2m+1 --O--C.sub.n H.sub.2n -- in which n is an integer of 1 to 4 and m is an integer of 1 to 4.Type: GrantFiled: May 12, 1992Date of Patent: May 31, 1994Assignee: Ricoh Company, Ltd.Inventors: Yasuo Sawada, Toru Yashiro, Yutaka Ueda
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Patent number: 5252372Abstract: An optical information recording medium is composed of a substrate and a recording layer which is formed on the substrate and made of a composition comprising at least gold and sulfur, with the gold content being 50 atomic percent or more in the composition.Type: GrantFiled: May 1, 1991Date of Patent: October 12, 1993Assignee: Ricoh Company, Ltd.Inventors: Toru Yashiro, Yutaka Ueda
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Patent number: 5242730Abstract: An optical recording medium is composed of a substrate, and a recording layer formed thereon, which is made of (a) a first recording layer which contains a light-absorbing organic compound and can be deformed upon irradiation of light thereto, and (b) a second recording layer which includes a sulfide containing antimony in an amount of 50 atm % or more, and can be deformed in accordance with the deformation of the first recording layer.Type: GrantFiled: February 14, 1991Date of Patent: September 7, 1993Assignee: Ricoh Company, Ltd.Inventors: Toru Yashiro, Yutaka Ueda
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Patent number: 5238722Abstract: An optical recording medium is composed of a substrate, a recording layer containing an inorganic material which includes as the main component a sulfide of at least one element selected from the group consisting of the elements of IIb, IIIb, IVb, Vb, and VIb groups, which is formed on the substrate, with a complex index of refraction of (n-ik), where n.gtoreq.1.8, and k.ltoreq.0.3, and a reflection layer formed on the recording layer. In this invention, an intermediate layer can be interposed either between the substrate and the recording layer, or between the recording layer and the reflection layer.Type: GrantFiled: November 26, 1991Date of Patent: August 24, 1993Assignee: Ricoh Company, Ltd.Inventors: Toru Yashiro, Yutaka Ueda
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Patent number: 5169745Abstract: An optical information recording medium comprising a substrate and a recording layer, formed on the substrate, which comprises a composition of antimony, sulfur, and one element selected from the group consisting of the elements belonging to group IIB and group IVA of the periodic table.Type: GrantFiled: September 5, 1990Date of Patent: December 8, 1992Assignee: Ricoh Company, Ltd.Inventors: Toru Yashiro, Yutaka Ueda