Patents by Inventor Richard T. Lewis
Richard T. Lewis 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: 7207424Abstract: A mixture of carbon-containing fibers, such as mesophase or isotropic pitch fibers, a suitable matrix material, such as a milled pitch is compressed while resistively heating the mixture to form a carbonized composite material. Preferably, the carbonized material has a density of at least about 1.30 g/cm3. Preferably, the composite material is formed in less than ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. A treating component may be impregnated into the composite. Consequently, carbon/carbon composite materials having final densities of about 1.6–1.8 g/cm3 or higher are readily achieved with one or two infiltration cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking.Type: GrantFiled: November 24, 2003Date of Patent: April 24, 2007Assignee: UCAR Carbon Company Inc.Inventors: Dai Huang, Dave Snyder, Richard T. Lewis, Irwin C. Lewis
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Patent number: 6878331Abstract: A mixture of carbon-containing fibers, such as mesophase or isotropic pitch fibers, a suitable matrix material, such as a milled pitch is compressed while resistively heating the mixture to form a carbonized composite material. Preferably, the carbonized material has a density of at least about 1.30 g/cm3. Preferably, the composite material is formed in less than ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. A treating component may be impregnated into the composite. Consequently, carbon composite materials having final densities of about 1.6-1.8 g/cm3 or higher are readily achieved with one or two infiltration cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking.Type: GrantFiled: February 24, 2003Date of Patent: April 12, 2005Assignee: UCAR Carbon Company Inc.Inventors: Dai Huang, Richard T. Lewis, Irwin C. Lewis, David Snyder
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Publication number: 20040155382Abstract: A mixture of carbon-containing fibers, a suitable matrix material, such as a milled pitch, and a friction additive is compressed while resistively heating the mixture to form a carbonized composite material. Preferably, the carbonized material has a density of at least about 1.3 g/cm3. Preferably, the composite material is formed in less than ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. Consequently, carbon/carbon composite materials having final densities of about 1.6-1.8 g/cm3 or higher are readily achieved with one or two impregnation cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking. In a second embodiment, the additive is impregnated into the compressed mixture with or without the mixture including the additive.Type: ApplicationFiled: November 24, 2003Publication date: August 12, 2004Inventors: Dai Huang, Richard T. Lewis, Irwin C. Lewis
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Publication number: 20040105969Abstract: A mixture of carbon-containing fibers, such as mesophase or isotropic pitch fibers, a suitable matrix material, such as a milled pitch is compressed while resistively heating the mixture to form a carbonized composite material. Preferably, the carbonized material has a density of at least about 1.30 g/cm3. Preferably, the composite material is formed in less than ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. A treating component may be impregnated into the composite. Consequently, carbon composite materials having final densities of about 1.6-1.8 g/cm3 or higher are readily achieved with one or two infiltration cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking.Type: ApplicationFiled: February 24, 2003Publication date: June 3, 2004Inventors: Dai Huang, Richard T. Lewis, Irwin C. Lewis, David Snyder
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Publication number: 20040041291Abstract: A process for preparing carbon electrodes is presented. In particular, a process for preparing carbon electrodes including the steps of combining calcined coke, a liquid pitch binder and carbon fibers derived from mesophase pitch to form an electrodestock blend; extruding the electrodestock blend to form a green electrodestock; baking the green stock to form a carbonized electrodestock; and graphitizing the carbonized stock by maintaining the carbonized tock at a temperature of at least about 2500.degree. C. for no more than about 18 hours is presented. The electrodes prepared by the inventive process are also presented.Type: ApplicationFiled: March 4, 2003Publication date: March 4, 2004Applicant: UCAR Carbon Company Inc.Inventors: Richard L. Shao, James W. Kortovich, Irwin C. Lewis, Richard T. Lewis
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Patent number: 6699427Abstract: A mixture of carbon-containing fibers, such as mesophase or isotropic pitch fibers, and a suitable matrix material, such as a milled pitch, is compressed while resistively heating the mixture to form a carbonized composite material having a density of about 1.5 g/cm3, or higher. The composite material is formed in under ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. Consequently, carbon/carbon composite materials having final densities of about 1.6-1.8 g/cm3, or higher are readily achieved with one or two infiltration cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking.Type: GrantFiled: July 26, 2002Date of Patent: March 2, 2004Assignee: UCAR Carbon Company Inc.Inventors: Dai Huang, Irwin C. Lewis, William David Cate, Richard T. Lewis
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Publication number: 20040017019Abstract: A mixture of carbon-containing fibers, such as mesophase or isotropic pitch fibers, and a suitable matrix material, such as a milled pitch, is compressed while resistively heating the mixture to form a carbonized composite material having a density of about 1.5 g/cm3, or higher. The composite material is formed in under ten minutes. This is a significantly shorter time than for conventional processes, which typically take several days and achieve a lower density material. Consequently, carbon/carbon composite materials having final densities of about 1.6-1.8 g/cm3, or higher are readily achieved with one or two infiltration cycles using a pitch or other carbonaceous material to fill voids in the composite and rebaking.Type: ApplicationFiled: July 26, 2002Publication date: January 29, 2004Applicant: UCAR Carbon Company Inc.Inventors: Dai Huang, Irwin C. Lewis, William David Cate, Richard T. Lewis
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Patent number: 5575582Abstract: Electrode joint for threadably joining two abutting carbon upper and lower electrode sections is provided with a locking pin releasably held in an upper electrode section which when released engages a groove in a lower electrode section.Type: GrantFiled: January 18, 1995Date of Patent: November 19, 1996Assignee: UCAR Carbon Technology CorporationInventors: Michael Frastaci, Richard T. Lewis, David G. Proctor, David M. Riffle
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Patent number: 5554627Abstract: Compounds of formula (I), wherein Q.sup.1 represents an aryl group; the dotted line represents an optional covalent bond; one of X and Y represents H and the other represents hydroxy or C.sub.1-6 alkoxy, or X and Y together form a group .dbd.O or .dbd.NOR.sup.5 where R.sup.5 is H or C.sub.1-6 alkyl; Z represents O, S or NR.sup.2, where R.sup.2 is H or C.sub.1-6 alkyl; W represents a bond or a saturated or unsaturated hydrocarbon chain of 1, 2, 3, 4, 5 or 6 carbon atoms; R.sup.1 represents H or C.sub.1-6 alkyl. R.sup.3 represents H, C.sub.1-6 alkyl or C.sub.2-6 alkenyl; R.sup.4 represents an optionally substituted phenyl group; and R.sup.6 represents a specified amino group or an optionally substituted aromatic or non-aromatic azacyclic or azabicyclic group; and salts and prodrugs are tachykinin receptor antagonists.Type: GrantFiled: April 27, 1995Date of Patent: September 10, 1996Assignee: Merck, Sharp & Dohme Ltd.Inventors: Richard T. Lewis, Angus M. MacLeod, Kevin J. Merchant
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Patent number: 5514718Abstract: Compounds of formula (I), and salts and prodrugs thereof ##STR1## wherein Q.sup.1 is halo substituted phenyl; naphthyl; indolyl; benzthiophenyl; benzofuranyl; benzyl; or fluorenyl;. . is an optional covalent bond;one of X and Y is H and the other is hydroxy or C.sub.1-6 alkoxy, or X and Y are together .dbd.O or .dbd.NOR.sup.5 ;R.sup.1 and R.sup.2 are H; C.sub.1-6 alkyl optionally substituted by hydroxy, cyano, COR.sup.c, CO.sub.2 R.sup.c, CONR.sup.c R.sup.d, or NR.sup.c R.sup.d (where R.sup.c and R.sup.d are H, C.sub.1-6 alkyl or phenyl(C.sub.0-4 alkyl) optionally substituted by C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halo and trifluoromethyl); phenyl(C.sub.1-4 alkyl) (optionally substituted by C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halo or trifluoromethyl); COR.sup.c ; CO.sub.2 R.sup.c ; CONR.sup.c R.sup.d ; COC.sub.1-6 alkylNR.sup.c R.sup.d ; CONR.sup.c COOR.sup.d ; or SO.sub.2 R.sup.c ;R.sup.3 is H, C.sub.1-6 alkyl or C.sub.2-6 alkenyl; andR.sup.4 is phenyl optionally substituted by C.sub.1-6 alkyl, C.sub.Type: GrantFiled: April 15, 1994Date of Patent: May 7, 1996Assignee: Merck, Sharp & Dohme LimitedInventors: Richard T. Lewis, Kevin J. Merchant, Angus M. MacLeod
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Patent number: 5461063Abstract: Compounds of formula (I), and salts and prodrugs thereof: ##STR1## wherein X represents O or S;Y represents (CH.sub.2).sub.m, where m is 0 or 1;Z represents (CH.sub.2).sub.n, where n is 0 or 1;R.sup.1 represents optionally substituted phenyl;R.sup.2 is phenyl, naphthyl, indazolyl, thienyl, furyl, pyridyl, thiazolyl, tetrazolyl, quinolyl, benzhydryl or benzyl;R.sup.3 is H, COR.sup.a, CO.sub.2 R.sup.a C(COOR).sub.2, C(CONR.sup.a R.sup.b).sub.2, COCONR.sup.a R.sup.b, COCO.sub.2 R.sup.a, C.sub.1-6 alkyl optionally substituted by a group selected from (CO.sub.2 R.sup.a, CONR.sup.a R.sup.b, hydroxy, cyano, COR.sup.a, NR.sup.a R.sup.b, C(NOH)NR.sup.a R.sup.b, CONHphenyl(C.sub.1-4 alkyl), COCO.sub.2 R.sup.a, C(.dbd.NR.sup.a)NR.sup.b NR.sup.c CO.sub.2 R.sup.d, CONHNR.sup.a R.sup.b, C(S)NR.sup.a R.sup.b, CONR.sup.a C.sub.1-6 alkylR.sup.12, CONR.sup.13 C.sub.2-6 alkynyl, CONR.sup.13 C.sub.2-6 alkenyl, COCONR.sup.a R.sup.b, CONR.sup.a C(NR.sup.b)NR.sup.c R.sup.d, CONR.sup.13 SO.sub.2 R.sup.a, SO.sub.2 R.sup.13 COR.sup.Type: GrantFiled: August 5, 1993Date of Patent: October 24, 1995Assignee: Merck Sharp & Dohme LimitedInventors: Fintan Kelleher, Richard T. Lewis
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Patent number: 5328927Abstract: Compounds of formula (I), and salts and prodrugs thereof ##STR1## wherein Q.sup.1 is halo substituted phenyl; naphthyl; indolyl; benzthiophenyl; benzofuranyl; benzyl; or fluorenyl;. . is an optional covalent bond;one of X and Y is H and the other is hydroxy or C.sub.1-6 alkoxy, or X and Y are together .dbd.0 or .dbd.NOR.sup.5 ;R.sup.1 and R.sup.2 are H; C.sub.1-6 alkyl optionally substituted by hydroxy, cyano, COR.sup.c, CO.sub.2 R.sup.c, CONR.sup.c R.sup.d, or NR.sup.c R.sup.d (where R.sup.c and R.sup.d are H, C.sub.1-6 alkyl or phenyl(C.sub.0-4 alkyl) optionally substituted by C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halo and trifluoromethyl); phenyl(C.sub.1-4 alkyl) (optionally substituted by C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halo or trifluoromethyl); COR.sup.c ; CO.sub.2 R.sup.c ; CONR.sup.c R.sup.d ; COC.sub.1-6 alkylNR.sup.c R.sup.d ; CONR.sup.c COOR.sup.d ; or SO.sub.2 R.sup.c ;R.sup.3 is H, C.sub.1-6 alkyl or C.sub.2-6 alkenyl; andR.sup.4 is phenyl optionally substituted by C.sub.1-6 alkyl, C.sub.Type: GrantFiled: February 24, 1993Date of Patent: July 12, 1994Assignee: Merck Sharpe & Dohme, Ltd.Inventors: Richard T. Lewis, Kevin J. Merchant, Angus M. MacLeod
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Patent number: 5192605Abstract: A flexible graphite laminate of flexible graphite and a core material bonded through an intermediate coating of an epoxy resin composite comprising an epoxy resin having a glass transition temperature after cure of below 120.degree. C. and particles of a thermoplastic agent dispersed in the epoxy resin and having a crystalline or partially crystalline structure and a melting temperature of between 120.degree. C. and 200.degree. C.Type: GrantFiled: October 1, 1991Date of Patent: March 9, 1993Assignee: UCAR Carbon Technology CorporationInventors: Robert A. Mercuri, Edwin J. Ohneth, Richard T. Lewis
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Patent number: 4715897Abstract: Benzenepolycarboxylic acid esters, preferably phthalate or isophthalate acid esters are used as plasticizers in carbon/pitch mixes used in the production of extruded carbon and graphite electrodes.Type: GrantFiled: May 13, 1986Date of Patent: December 29, 1987Assignee: Union Carbide CorporationInventors: James A. Tallon, Richard T. Lewis
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Patent number: 4303631Abstract: A process for producing a carbon fiber features converting a precursor material under atmospheric pressure with heat but without sparging to a predetermined mesophase containing pitch, and thereafter continuing the heat treatment with sparging.Type: GrantFiled: June 26, 1980Date of Patent: December 1, 1981Assignee: Union Carbide CorporationInventors: Richard T. Lewis, Irwin C. Lewis