Patents by Inventor Richard Thomas Lewis

Richard Thomas 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: 6214158
    Abstract: A curable, high temperature, carbonaceous, cement paste composition comprising a catalyst; a carbon filler present in an amount of about 20 to about 60 wt. %; a polymerizable monomeric system present in an amount of about 7 to about 30 wt. % comprising a dialkyl ester of an aromatic tetracarboxylic acid, an aromatic diamine, and a monoalkyl ester of an acid selected from the group consisting of 5-norbornene-2,3-dicarboxylic acid and phthalic acid; and a furan solvent present in an amount of about 20 to about 60 wt. %. The most preferred embodiment comprising a monomeric system comprising a dimethyl ester of 3,3′,4,4′-benzophenonetetracarboxylic acid, 2,2′-bis (4-[4-aminophenoxyl]phenyl)propane and a monomethyl ester of 5-norbornene-2,3-dicarboxylic acid with furfuryl alcohol and a catalytic solution of about 50% ZnCl2, has a glass transition temperature of about 280° C. after curing by heating at about 2° C./minute to about 240° C. and holding for about 2 hours.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: April 10, 2001
    Assignee: UCAR Carbon Company Inc.
    Inventors: Charles Chi-Chieh Chiu, Irwin Charles Lewis, Richard Thomas Lewis
  • Patent number: 6133255
    Abstract: Tricyclic pyridin-2-one analogues which are ligands for GABA.sub.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: October 17, 2000
    Assignee: Merck Sharp & Dohme Limited
    Inventors: Timothy Harrison, Richard Thomas Lewis, Christopher Richard Moyes, Alan Nadin, Andrew Pate Owens
  • Patent number: 5811431
    Abstract: The present invention relates to compounds of formula (I), wherein n is zero, 1, 2 or 3; R represents C.sub.1-6 alkyl, C.sub.1-6 alkoxy, hydroxy, halogen, cyano, trifluoromethyl SO.sub.2 C.sub.1-6 alkyl, NR.sup.a R.sup.b, NR.sup.a COR.sup.b or CONR.sup.a R.sup.b, where R.sup.a and R.sup.b are each H, C.sub.1-4 alkyl, phenyl or trifluoromethyl; R.sup.1 represents phenyl optionally substituted by 1, 2 or 3 of C.sub.1-6 alkyl, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkylC.sub.1-4 alkyl, --O(CH.sub.2).sub.p O-- (where p is 1 or 2), halogen, cyano, nitro, trifluoromethyl, trimethylsilyl, OR.sup.a, SR.sup.a, SOR.sup.a, SO.sub.2 R.sup.a, NR.sup.a R.sup.b, NR.sup.a COR.sup.b, NR.sup.a CO.sub.2 R.sup.b, COR.sup.a, CO.sub.2 R.sup.a or CONR.sup.a R.sup.b ; naphthyl; benzhydryl; or benyl, where the naphthyl group or each phenyl moiety of benzyl and benzhydryl may be substituted by C.sub.1-6 alkyl, C.sub.1-6 alkoxy, halogen or trifluoromethyl; R.sup.
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: September 22, 1998
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Tamara Ladduwahetty, Richard Thomas Lewis, Angus Murray MacLeod, Kevin John Merchant
  • Patent number: 5760018
    Abstract: The present invention is directed to certain compounds represented by structural formula I: ##STR1## or a pharmaceutically acceptable salt thereof wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, A.sup.1, A.sup.2, X, m and n are defined herein. The compounds of this invention are tachykinin receptor antagonists and are of particular use in the treatment of pain, inflammation, migraine and emesis.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: June 2, 1998
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Raymond Baker, Richard Thomas Lewis, Angus Murray MacLeod, Graeme Irvine Stevenson
  • Patent number: 5719149
    Abstract: The present invention relates to compounds of formula (I) wherein: R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are selected from a variety of suitable aromatic substituents; R.sup.6 is hydrogen, C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkylC.sub.1-4 alkyl, phenyl, or C.sub.2 -alkyl substituted by C.sub.1-4 alkoxy or hydroxy; R.sup.7 is hydrogen, C.sub.1-6 alkyl, C.sub.3-7 cycloalkyl, C.sub.3-7 cycloalkylC.sub.1-4 alkyl, phenyl, C.sub.2-4 alkyl substituted by C.sub.1-4 alkoxy or hydroxy, or the group C(.dbd.NR.sup.c)NR.sup.a R.sup.b ; or R.sup.6 and R.sup.7, together with the nitrogen atom to which they are attached, form an optionally substituted saturated heterocyclic ring of 4 to 7 ring atoms which may optionally contain in the ring one oxygen or sulphur atom or a group selected from NR.sup.8, S(O) or S(O).sub.2 ; or R.sup.6 and R.sup.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: February 17, 1998
    Assignee: Merck Sharp & Dohme Ltd.
    Inventors: Paul Finke, Timothy Harrison, Richard Thomas Lewis, Angus Murray MacLeod, Andrew Pate Owens
  • Patent number: 5674889
    Abstract: The present invention relates to compounds of formula (I) and salts and prodrugs thereof, wherein Q.sup.1 represents a phenyl group substituted by one or more halo optionally substituted naphthyl, optionally substituted indolyl, optionally substituted benzthiophenyl, optionally substituted benzofuranyl, optionally substituted benzyl or optionally substituted fluorenyl; R.sup.1 represents H or C.sub.1-6 alkyl; R.sup.2 represents H, C.sub.1-6 alkyl or C.sub.2-6 alkenyl; Z.sup.1 represents a group selected from (a) or (b). The compounds are tachykinin antagonists useful for treating pain or inflammation, migraine or emesis.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: October 7, 1997
    Assignee: Merck, Sharp & Dohme, Ltd.
    Inventors: Fintan Kelleher, Richard Thomas Lewis, Angus Murray Macleod
  • Patent number: 5668153
    Abstract: Compounds of formula (I) ##STR1## exemplified by formulae (Ia) and (Ib) ##STR2## are tachykinin receptor antagonists useful in the treatment of disorders associated with the presence of an excess of tachykinins such as pain, inflammation, migraine, emesis and post herpetic neuralgia.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: September 16, 1997
    Assignee: Merck Sharp & Dohme, Ltd.
    Inventors: Richard Thomas Lewis, Angus Murray MacLeod