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).

  • Patent number: 7207424
    Abstract: 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: Grant
    Filed: November 24, 2003
    Date of Patent: April 24, 2007
    Assignee: UCAR Carbon Company Inc.
    Inventors: Dai Huang, Dave Snyder, Richard T. Lewis, Irwin C. Lewis
  • Patent number: 6878331
    Abstract: 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: Grant
    Filed: February 24, 2003
    Date of Patent: April 12, 2005
    Assignee: UCAR Carbon Company Inc.
    Inventors: Dai Huang, Richard T. Lewis, Irwin C. Lewis, David Snyder
  • Publication number: 20040155382
    Abstract: 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: Application
    Filed: November 24, 2003
    Publication date: August 12, 2004
    Inventors: Dai Huang, Richard T. Lewis, Irwin C. Lewis
  • Publication number: 20040105969
    Abstract: 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: Application
    Filed: February 24, 2003
    Publication date: June 3, 2004
    Inventors: Dai Huang, Richard T. Lewis, Irwin C. Lewis, David Snyder
  • Publication number: 20040041291
    Abstract: 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: Application
    Filed: March 4, 2003
    Publication date: March 4, 2004
    Applicant: UCAR Carbon Company Inc.
    Inventors: Richard L. Shao, James W. Kortovich, Irwin C. Lewis, Richard T. Lewis
  • Patent number: 6699427
    Abstract: 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: Grant
    Filed: July 26, 2002
    Date of Patent: March 2, 2004
    Assignee: UCAR Carbon Company Inc.
    Inventors: Dai Huang, Irwin C. Lewis, William David Cate, Richard T. Lewis
  • Publication number: 20040017019
    Abstract: 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: Application
    Filed: July 26, 2002
    Publication date: January 29, 2004
    Applicant: UCAR Carbon Company Inc.
    Inventors: Dai Huang, Irwin C. Lewis, William David Cate, Richard T. Lewis
  • Patent number: 5575582
    Abstract: 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: Grant
    Filed: January 18, 1995
    Date of Patent: November 19, 1996
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Michael Frastaci, Richard T. Lewis, David G. Proctor, David M. Riffle
  • Patent number: 5554627
    Abstract: 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: Grant
    Filed: April 27, 1995
    Date of Patent: September 10, 1996
    Assignee: Merck, Sharp & Dohme Ltd.
    Inventors: Richard T. Lewis, Angus M. MacLeod, Kevin J. Merchant
  • Patent number: 5514718
    Abstract: 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: Grant
    Filed: April 15, 1994
    Date of Patent: May 7, 1996
    Assignee: Merck, Sharp & Dohme Limited
    Inventors: Richard T. Lewis, Kevin J. Merchant, Angus M. MacLeod
  • Patent number: 5461063
    Abstract: 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: Grant
    Filed: August 5, 1993
    Date of Patent: October 24, 1995
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Fintan Kelleher, Richard T. Lewis
  • Patent number: 5328927
    Abstract: 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: Grant
    Filed: February 24, 1993
    Date of Patent: July 12, 1994
    Assignee: Merck Sharpe & Dohme, Ltd.
    Inventors: Richard T. Lewis, Kevin J. Merchant, Angus M. MacLeod
  • Patent number: 5192605
    Abstract: 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: Grant
    Filed: October 1, 1991
    Date of Patent: March 9, 1993
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Robert A. Mercuri, Edwin J. Ohneth, Richard T. Lewis
  • Patent number: 4715897
    Abstract: 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: Grant
    Filed: May 13, 1986
    Date of Patent: December 29, 1987
    Assignee: Union Carbide Corporation
    Inventors: James A. Tallon, Richard T. Lewis
  • Patent number: 4303631
    Abstract: 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: Grant
    Filed: June 26, 1980
    Date of Patent: December 1, 1981
    Assignee: Union Carbide Corporation
    Inventors: Richard T. Lewis, Irwin C. Lewis