Patents by Inventor Naoki Takase
Naoki Takase 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: 11973312Abstract: A semiconductor laser device comprises a stem serving as a base; a laser diode LD submount having surface electrodes arranged thereon and joined to the surface of the stem; an LD chip joined to the surface electrode and connected with the surface electrode; and leads fixed in through holes formed in the stem by means of sealing parts and electrically connected to the surface electrodes via embedded layers in via holes formed in the LD submount, wherein grooves are formed in portions of the sealing parts or in portions of the LD submount around the connections between the leads and the embedded layers, to obtain a good modulated light waveform.Type: GrantFiled: July 2, 2019Date of Patent: April 30, 2024Assignee: Mitsubishi Electric CorporationInventors: Naoki Kosaka, Ayumi Fuchida, Masaaki Shimada, Go Sakaino, Tadashi Takase
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Patent number: 7862972Abstract: Disclosed herein is a polyester resin-based toner binder which can impart both excellent anti-blocking property under high temperature and humidity conditions and low-temperature fixing properties to a toner. The toner binder for developing electrostatic images includes a polycondensation polyester resin produced in the presence of at least one titanium-containing catalyst (a) represented by the following general formula (I) or (II): Ti(—X)m(—OH)n??(I) O?Ti(—X)p(—OR)q??(II) wherein X is a residue formed by removing H of one OH group from a (poly)alkanolamine having 2 to 12 carbon atoms; R is H or a C1 to C8 alkyl group which may have 1 to 3 ether bonds; m is 1 to 4, n is 0 to 3, and the sum of m and n is 4; and p is 1 to 2, q is 0 to 1, and the sum of p and q is 2 (m, n, p, and q are each an integer).Type: GrantFiled: March 16, 2006Date of Patent: January 4, 2011Assignee: Sanyo Chemical Industries, Ltd.Inventor: Naoki Takase
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Patent number: 7585921Abstract: The present invention provides a resin for toner binders, which comprises two polyester resins (A) and (B), said resin (A) being a crosslinked modified polyester resin consisting of the reaction product from a crosslinked polyester resin (a) and a polyepoxide (c) and said resin (B) being an acid anhydride-modified linear polyester resin consisting of the reaction product from a linear polyester resin (b) and an acid anhydride (r).Type: GrantFiled: December 16, 2002Date of Patent: September 8, 2009Assignee: Sanyo Chemical Industries, Ltd.Inventors: Hiroshi Kishiki, Naoki Takase, Syuji Yamada, Tatsuyoshi Ishii
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Publication number: 20090220881Abstract: Disclosed herein is a polyester resin-based toner binder which can impart both excellent anti-blocking property under high temperature and humidity conditions and low-temperature fixing properties to a toner. The toner binder for developing electrostatic images includes a polycondensation polyester resin produced in the presence of at least one titanium-containing catalyst (a) represented by the following general formula (I) or (II): Ti(—X)m(—OH)n??(I) O?Ti(—X)p(—OR)q??(II) wherein X is a residue formed by removing H of one OH group from a (poly)alkanolamine having 2 to 12 carbon atoms; R is H or a C1 to C8 alkyl group which may have 1 to 3 ether bonds; m is 1 to 4, n is 0 to 3, and the sum of m and n is 4; and p is 1 to 2, q is 0 to 1, and the sum of p and q is 2 (m, n, p, and q are each an integer).Type: ApplicationFiled: March 16, 2006Publication date: September 3, 2009Applicant: Sanyo Chemical Industries, Ltd.Inventor: Naoki Takase
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Patent number: 7049041Abstract: The present invention provides a toner binder for developing electrostatic charge images, which binder comprises a polycondensate polyester resin, said polyester resin being a product formed in the presence of at least one titanium-containing catalyst (A) selected from the group consisting of a titanium halides (A1), a titanium diketone enolate (A2), a titanium carboxylate (A3), a titanyl carboxylate (A4), and a titanyl carboxylate salt (A5). Furthermore, the present invention provides a toner binder for developing electrostatic charge images, which binder comprises a polycondensate polyester resin, said polyester resin being a product formed in the presence of at least one tin-containing catalyst (B) selected from the group consisting of dioctyltin oxide (B1), monobutyltin oxide (B2), and dibutyltin oxide (B3), with the content of tributyltin compounds in (B3) being not more than 250 ppm.Type: GrantFiled: February 28, 2003Date of Patent: May 23, 2006Assignee: Sanyo Chemical Industries, Ltd.Inventors: Hiroshi Kishiki, Tomohisa Kato, Naoki Takase, Syuji Yamada, Yoko Sakurai
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Publication number: 20050064313Abstract: The present invention provides a resin for toner binders, which comprises two polyester resins (A) and (B), said resin (A) being a crosslinked modified polyester resin consisting of the reaction product from a crosslinked polyester resin (a) and a polyepoxide (c) and said resin (B) being an acid anhydride-modified linear polyester resin consisting of the reaction product from a linear polyester resin (b) and an acid anhydride (r).Type: ApplicationFiled: December 16, 2002Publication date: March 24, 2005Inventors: Hiroshi Kishiki, Naoki Takase, Syuji Yamada, Tatsuyoshi Ishii
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Publication number: 20040241565Abstract: The present invention provides a toner binder for developing electrostatic charge images,Type: ApplicationFiled: July 13, 2004Publication date: December 2, 2004Inventors: Hiroshi Kishiki, Tomohisa Kato, Naoki Takase, Syuji Yamada, Yoko Sakurai
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Patent number: 5728501Abstract: A charge controller for a toner, containing a polymer of an ethylenically unsaturated monomer, where the polymer has a dielectric loss tangent (tan .delta.) at 100 kHz of 0.008 to 0.3 and a water absorbency of at most 10% by weight, and selected from the group consisting of:(1) a polymer (A1) having units resulting from a monomer (1) having an aromatic ring substituted with at least one electron-attracting group (X) selected from the group consisting of halogen, a nitro group and a cyano group; and(2) a copolymer (A2) of a monomer (2) having an organic acid group or salt thereof, with one or more copolymerizable monomers,a toner binder and toner containing the same are provided which give excellent properties with respect to electrostatic charge amount, charging rate and environmental stability, as well as providing an essentially colorless charge controller containing no metal and improved dispersing properties and transparency.Type: GrantFiled: March 22, 1996Date of Patent: March 17, 1998Assignee: Sanyo Chemical Industries, Ltd.Inventors: Hideo Nakanishi, Tohru Ohama, Naoki Takase, Akira Kodani, Munekazu Satake
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Patent number: 5460915Abstract: A charge controller for an electrophotographic toner is disclosed which comprises a graft or block copolymer comprising:(a) a polymer moiety having an alkyl group containing 6-50 carbon atoms and a carboxyl group, said moiety being selected from the group consisting of: a moiety of a polymer or a copolymer containing at least 5 mol. % of monomer units of a monoalkyl ester of an .alpha.,.beta.-ethylenically unsaturated dicarboxylic acid, containing 6-50 carbon atoms in the alkyl group; and a moiety of a copolymer containing 5-75 mol. % of monomer units of a carboxylic group-containing .alpha.,.beta.-ethylenically unsaturated monomer, and 6-80 mol. % of monomer units of an ethylenically unsaturated monomer having an alkyl group containing 6-50 carbon atoms; and(b) a polymer moiety, bound graft-wise or block-wise thereto, said moiety (b) being selected from the group consisting of a styrenic polymer moiety, and a polyester moiety.Type: GrantFiled: June 14, 1994Date of Patent: October 24, 1995Assignee: Sanyo Chemical Industries, Ltd.Inventors: Hideo Nakanishi, Tohru Ohama, Hiroyuki Ikeda, Naoki Takase, Akira Kodani