Patents by Inventor Koichi Mizumoto
Koichi Mizumoto 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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Publication number: 20180084942Abstract: Ovenware having a container portion and a handle portion, wherein the ovenware is molded from a resin composition comprising a liquid crystal polyester resin and a talc filler, the amount of the talc filler is at least 55 parts by mass but not more than 100 parts by mass per 100 parts by mass of the liquid crystal polyester resin, the capacity of the ovenware is at least 500 mL but not more than 6 L, and the wall thickness of the container portion is at least 0.3 mm but not more than 5 mm.Type: ApplicationFiled: March 25, 2016Publication date: March 29, 2018Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Shintaro SAITO, Koichi MIZUMOTO
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Publication number: 20160264754Abstract: Provided is a resin composition comprising 30 to 120 parts by mass of a white pigment and 0.5 to 30 parts by mass of a flame retarder, per 100 parts by mass of a liquid crystal polyester.Type: ApplicationFiled: October 24, 2014Publication date: September 15, 2016Inventors: Masaaki TANAKA, Koichi MIZUMOTO
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Patent number: 9193094Abstract: The present invention is related to a method for producing a resin composition including feeding a resin (A), a fibrous filler (B), and a particulate filler (C) which is harder than the fibrous filler (B) to an extruder, and melt-kneading to extrude a kneaded material, the resin composition comprising a fibrous filler (B) which is 140 ?m or less in weight average fiber length. According to the present invention, a production method with high versatility is provided in which a resin composition containing the fibrous filler having the weight average fiber length of 140 ?m or less is effectively produced.Type: GrantFiled: December 21, 2012Date of Patent: November 24, 2015Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Sekimura, Hiroshi Harada, Koichi Mizumoto
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Patent number: 9138915Abstract: A method is provided for producing a resin composition in which the fiber length of the fibrous filler contained in the resin composition is controlled. The method includes a step of feeding a resin (A) and a fibrous filler (B) to an extruder, melt-kneading and then extruding them. The extruder includes a cylinder, a screw mounted in the cylinder, a main feed port provided in the cylinder, and a side feed port provided rearwards from the main feed port in the extrusion direction. Part of the resin (A) and part of a fibrous filler (B) having a weight-average fiber length of not less than 1 mm are fed through the main feed port and the rest of the resin (A) and the rest of the fibrous filler (B) having a weight-average fiber length of not less than 1 mm are fed through the side feed port.Type: GrantFiled: September 6, 2012Date of Patent: September 22, 2015Assignee: Sumitomo Chemical Company, LimitedInventors: Satoshi Sekimura, Hiroshi Harada, Koichi Mizumoto
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Publication number: 20150011691Abstract: The present invention is related to a method for producing a resin composition including feeding a resin (A), a fibrous filler (B), and a particulate filler (C) which is harder than the fibrous filler (B) to an extruder, and melt-kneading to extrude a kneaded material, the resin composition comprising a fibrous filler (B) which is 140 ?m or less in weight average fiber length. According to the present invention, a production method with high versatility is provided in which a resin composition containing the fibrous filler having the weight average fiber length of 140 ?m or less is effectively produced.Type: ApplicationFiled: December 21, 2012Publication date: January 8, 2015Inventors: Satoshi Sekimura, Hiroshi Harada, Koichi Mizumoto
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Publication number: 20130079454Abstract: A method is provided for producing a resin composition in which the fiber length of the fibrous filler contained in the resin composition is controlled. The method includes a step of feeding a resin (A) and a fibrous filler (B) to an extruder, melt-kneading and then extruding them. The extruder includes a cylinder, a screw mounted in the cylinder, a main feed port provided in the cylinder, and a side feed port provided rearwards from the main feed port in the extrusion direction. Part of the resin (A) and part of a fibrous filler (B) having a weight-average fiber length of not less than 1 mm are fed through the main feed port and the rest of the resin (A) and the rest of the fibrous filler (B) having a weight-average fiber length of not less than 1 mm are fed through the side feed port.Type: ApplicationFiled: September 6, 2012Publication date: March 28, 2013Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Satoshi SEKIMURA, Hiroshi HARADA, Koichi MIZUMOTO
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Patent number: 7740770Abstract: The present invention provides for a resin molded article comprising a liquid crystalline polymer and a fibrous filler, the article having a surface with difference of 0.4 ?m or smaller in a surface roughness expressed by Ra value measured before and after repeating 30 times the operation of pasting and peeling a tape having an adhesive power of 4.0 N/mm. The resin molded article is excellent in mechanical strength when used in an electric/electronic component or in an optical apparatus.Type: GrantFiled: February 21, 2008Date of Patent: June 22, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Koichi Mizumoto, Hiroshi Harada
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Publication number: 20080203358Abstract: The present invention provides for a resin molded article comprising a liquid crystalline polymer and a fibrous filler, the article having a surface with difference of 0.4 ?m or smaller in a surface roughness expressed by Ra value measured before and after repeating 30 times the operation of pasting and peeling a tape having an adhesive power of 4.0 N/mm. The resin molded article is excellent in mechanical strength when used in an electric/electronic component or in an optical apparatus.Type: ApplicationFiled: February 21, 2008Publication date: August 28, 2008Inventors: Koichi Mizumoto, Hiroshi Harada
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Patent number: 6582625Abstract: A process for producing a thermotropic liquid crystalline polymer having a flow beginning temperature of 340° C. or more comprising raising the temperature of a thermotropic liquid crystalline polymer from 200° C. or less to raising end temperature (A° C.) of (FT0+50)° C. or more in substantially solid phase condition, wherein the thermotropic liquid crystalline polymer has a flow beginning temperature (FT0) of 200° C. or more and 300° C. or less, and in a step of raising the resin temperature (t) from (FT0+20)° C. to (FT0+50)° C. (step (1)), the average raising speed of the resin temperature is from over 0.1° C./min. to less than 0.5° C./min. and the flow beginning temperature of the thermotropic liquid crystalline polymer at each resin temperature is (t−10)° C. or more and (t+40)° C. or less.Type: GrantFiled: December 11, 2001Date of Patent: June 24, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Tohru Nagashima, Koichi Mizumoto, Hiroshi Harada
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Publication number: 20020121626Abstract: A process for producing a thermotropic liquid crystalline polymer having a flow beginning temperature of 340° C. or more comprising raising the temperature of a thermotropic liquid crystalline polymer from 200° C. or less to raising end temperature (A° C.) of (FT0+50)° C.Type: ApplicationFiled: December 11, 2001Publication date: September 5, 2002Inventors: Tohru Nagashima, Koichi Mizumoto, Hiroshi Harada
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Patent number: 6201102Abstract: A method of producing an aromatic polyester by distilling a low-boiling fraction from a polycondensation vessel containing a reaction product obtained by acetylating raw monomers of the aromatic polyester with acetic anhydride, wherein the polycondensation vessel is provided with a partial condenser, and controlling a temperature of the low-boiling fraction distilled from the partial condenser within a range from 80 to 150° C. while the amount of the low-boiling fraction distilled from the partial condenser is within a range from 50% to 90% based on a theoretical recovery amount is provided; and according to this method, adhesion of low-molecular compounds to a partial condenser in the production can be prevented and an improvement in yield of the aromatic polyester and stabilization of product quality can be accomplished.Type: GrantFiled: January 20, 2000Date of Patent: March 13, 2001Assignee: Sumitomo Chemical Co., Ltd.Inventors: Kazuo Hayatsu, Koichi Mizumoto, Hiroshi Harada
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Patent number: 6140455Abstract: Provided is a liquid crystalline polyester resin for extrusion molding having a solder heat resistant temperature of 250.degree. C. or more, wherein the ratio ((viscosity 2b)/(viscosity 1b)) of the melt viscosity (viscosity 1b) under a shearing speed of 1000/sec at the flow initiation temperature and the melt viscosity (viscosity 2b) under the same shearing speed at a temperature 20.degree. C. higher than the flow initiation temperature is from 0.10 to 0.70. The extrusion molding material of the above-described liquid crystalline polyester resin has excellent heat resistance, and can provide an extrusion molded article, especially a film having excellent appearance.Type: GrantFiled: November 10, 1999Date of Patent: October 31, 2000Assignee: Sumitomo Chemical Company, LimitedInventors: Tohru Nagashima, Koichi Mizumoto, Manabu Hirakawa