Patents by Inventor George Robert Brown

George Robert Brown 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: 10447222
    Abstract: Dynamic error vector magnitude (EVM) compensation is accomplished for radio frequency (RF) power amplifiers (PAs) which experience EVM distortion from thermal settling. Thermal settling causes gain changes in the PAs, and systems, apparatuses, and methods of the present disclosure compensate for known thermal transients of PAs.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: October 15, 2019
    Assignee: Qorvo US, Inc.
    Inventors: Baker Scott, David Reed, Christopher T. Brown, Dirk Robert Walter Leipold, George Maxim
  • Patent number: 7772432
    Abstract: The invention concerns amide derivatives of the Formula (I) wherein R3 is (1-6C)alkyl or halogeno; Q is aryl or heteroaryl which optionally bears 1, 2, 3 or 4 substituents such as hydroxy, halogeno, trifluoromethyl, cyano, (1-6C)alkyl, (1-6C)alkoxy, halogeno-(1-6C)alkyl, hydroxyl-(1-6C)alkyl, di-[(1-6C)akly]amino-(1-6C)alkyl, hydroxy-(2-6C)alkoxy, (1-6C)alkoxy-(2-6C)alkoxy, di-[(1-6C)alkyl]amino-(2-6C)alkoxy, amino(2-6C)alkylamino, N-(1-6C)alkyl-(1-6C)alkylamino-(2-6C)alkylamino, aryl, aryl-(1-6C)alkoxy, heteroaryl, heteroaryl-(1-6C)alkoxy, heterocyclyl, heterocyclyl-(1-6C)alkyl, heterocyclyloxy and heterocyclyl-(1-6C)alkoxy; p is 0-2 and R2 is a substituent such as hydroxy and halogeno; q is 0-4; and R4 includes optionally substituted aryl, cycloalkyl, heteroaryl and heterocyclyl; or pharmaceutically-acceptable salts or in-vivo-cleavable esters thereof; processes for their preparation, pharmaceutical compositions containing them and their use in the treatment of diseases or medical conditions mediated by cyt
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: August 10, 2010
    Assignee: AstraZeneca AB
    Inventors: Dearg Sutherland Brown, George Robert Brown
  • Patent number: 6440972
    Abstract: This invention concerns heterocyclic derivatives of formula (I) which are useful in inhibiting oxido-squalene cyclase, processes for their preparation and pharmaceutical compositions containing them. The present invention is also concerned with heterocyclic derivatives capable of inhibiting cholesterol biosynthesis and hence the lowering cholesterol levels in blood plasma. The present invention also relates to methods of using such heterocyclic derivatives in diseases and medical conditions such as hypercholesterolemia and atherosclerosis.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: August 27, 2002
    Assignee: Zeneca Limited
    Inventor: George Robert Brown
  • Patent number: 6391880
    Abstract: This invention concerns heterocyclic derivatives of formula (I) which are useful in inhibiting oxido-squalene cyclase, processes for their preparation and pharmaceutical compositions containing them. The present invention is also concerned with heterocyclic derivatives capable of inhibiting cholesterol biosynthesis and hence in lowering cholesterol levels in blood plasma. The present invention also relates to methods of using such heterocyclic derivatives in diseases and medical conditions such as hypercholesterolemia and atherosclerosis.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: May 21, 2002
    Assignee: Zeneca Limited
    Inventors: Alan John Foubister, George Robert Brown, Nicholas John Newcombe
  • Patent number: 6313127
    Abstract: Compounds of formula (I) in which all variables are defined in the description and their salts inhibit the enzyme oxido squalene cyclase and are useful in treating hypercholesterolemia and also as anti-fungal agents. Processes for their preparation are also described together with their use in medicine.
    Type: Grant
    Filed: July 31, 1998
    Date of Patent: November 6, 2001
    Assignee: Zeneca Limited
    Inventors: David Waterson, Elaine Sophie Elizabeth Stokes, George Robert Brown, John Graham Cumming, Nicholas John Newcombe, Robin Wood, William John Watkins
  • Patent number: 6093718
    Abstract: This invention concerns heterocyclic derivatives which are useful in inhibiting oxido-squalene cyclase, processes for their preparation and pharmaceutical compositions containing them. The present invention is also concerned with heterocyclic derivatives capable of inhibiting cholesterol biosynthesis and hence in lowering cholesterol levels in blood plasma. The present invention also relates to methods of using such heterocyclic derivatives in diseases and medical conditions such as hypercholesterolemia and atherosclerosis.
    Type: Grant
    Filed: February 12, 1999
    Date of Patent: July 25, 2000
    Assignee: Zeneca Limited
    Inventors: David Waterson, Elaine Sophie Elizabeth Stokes, George Robert Brown, Nicholas John Newcombe
  • Patent number: 6090813
    Abstract: A compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein G, T.sup.1, T.sup.2 and T.sup.3 are selected from CH and N; provided that T.sup.2 and T.sup.3 are not both CH; A is selected from a direct bond and (1-4C)alkylene; X is selected from oxy, thio, sulphinyl, sulphonyl, carbonyl, carbonylamino, N-di-(1-6C)alkylcarbonylamino, sulphonamido, methylene, (1-4C)alkylmethylene and di-(1-6C)alkylmethylene, and when T.sup.2 is CH, X may also be selected from aminosulphonyl and oxycarbonyl; and Q is selected from (5-7C)cycloalkyl, a heterocyclic moiety containing up to 4 heteroatoms selected from nitrogen, oxygen and sulphur, phenyl, naphthyl, phenyl(1-4C)alkyl and phenyl(2-6C)alkenyl; for the manufacture of a medicament for treating diseases or medical conditions in which an inhibition of oxido-squalene cyclase is desirable.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: July 18, 2000
    Assignee: Zeneca Limited
    Inventors: David Waterson, Elaine Sophie Elizabeth Stokes, George Robert Brown, Robin Wood
  • Patent number: 5919793
    Abstract: Compounds of formula (I) wherein R.sup.1 is hydrogen or hydroxy; R.sup.2 is hydrogen; or R.sup.1 and R.sup.2 are joined together so that CR.sup.1 14 CR.sup.2 is a double bond; X is selected from --Ch.sub.2 CH.sub.2 --, --C.dbd.CH--, --C.tbd.C--, --CH.sub.2 O--, --OCH.sub.2, CH.sub.2 NH--, --NHCH.sub.2 --, --CH.sub.2 CO--, --COCH.sub.2 --, --CH.sub.2 S(O).sub.n -- and --S(O).sub.n CH.sub.
    Type: Grant
    Filed: October 26, 1995
    Date of Patent: July 6, 1999
    Assignee: Zeneca Limited
    Inventors: George Robert Brown, Paul Robert Owen Whittamore, David Robert Brittain
  • Patent number: 5866611
    Abstract: Compounds of formula I, and their pharmaceutically acceptable salts, ##STR1## in which R.sup.1 and R.sup.2 are hydrogen, alkyl, cycloalkyl, cycloalkylalkyl, phenylalkyl or alkenyl; or NR.sup.1 R.sup.2 is a heterocyclic group; A is trimethylene optionally substituted by alkyl and the phenyl ring is optionally substituted by substituents such as halogeno, alkenyl, amino, cyano, ureido, alkyl, carbamoylalkyl, alkanoylamino, alkoxycarbonyl, N-alkyl-alkanoylamino, alkanoyl and amines thereof; are inhibitors of squalene synthese and hence useful in treating diseases in which a lowering of cholesterol is desirable. As well as the use of these compounds in medicine, novel compounds, processes for their preparation and pharmaceutical compositions are also referred to.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: February 2, 1999
    Assignee: Zeneca Limited
    Inventors: George Robert Brown, Murdoch Allan Eakin, Peter John Harrison, deceased, Keith Blakeney Mallion
  • Patent number: 5792777
    Abstract: Biphenylylquinuclidine compounds of the formula I: ##STR1## and pharmaceutically-acceptable salts thereof; wherein R.sup.1 is hydrogen or hydroxy; R.sup.2 is hydrogen; or R.sup.1 and R.sup.2 are joined together so that CR.sup.1 -CR.sup.2 is a double bond; and one or both ring A and ring B may be optionally unsubstituted or independently substituted by one or more substituents selected from halogeno, hydroxy, amino, nitro, cyano, carboxy, carbamoyl, (1-6C)alkyl, (1-6C)alkoxy, (1-6C)alkylamino, di-?(1-6C)alkyl!amino, N-?(1-6C)alkyl!carbamoyl, N,N-di-?(1-6C)alkyl!carbamoyl, (1-6C)alkoxycarbonyl, (1-6C)alkylthio, (1-6C)alkylsulphinyl, (1-6C)alkylsulphonyl and halogeno-(1-6C)alkyl; are inhibitors of squalene synthase and are hence useful in treating diseases or medical conditions such as hypercholesterolemia, atherosclerosis and fungal diseases.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: August 11, 1998
    Assignee: Zeneca Limited
    Inventors: George Robert Brown, Peter John Harrison, deceased, Keith Blakeney Mallion
  • Patent number: 5770608
    Abstract: Quinuclidine compounds of the formula I: ##STR1## R.sup.1 is hydrogen or hydroxy; R.sup.2 is hydrogen;or R.sup.1 and R.sup.2 are joined together so that CR.sup.1 --CR.sup.2 is a double bond;X is selected from --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 NH--, --NHCH.sub.2 --, --CH.sub.2 CO--, --COCH.sub.2 --, --CH.dbd.N--, --N.dbd.CH--, --CH.sub.2 S--, --SCH.sub.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: June 23, 1998
    Assignee: Imperial Chemical Industries PLC
    Inventors: George Robert Brown, Keith Blakeney Mallion, Peter John Harrison, deceased
  • Patent number: 5714496
    Abstract: Compounds of formula (I) and their pharmaceutically acceptable salts in which R.sup.1 is hydrogen or hydroxy; R.sup.2 is hydrogen; or R.sup.1 and R.sup.2 are joined together so that CR.sup.1 -CR.sup.2 is a double bond; X is selected from --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CH.sub.2 O--, --CH.sub.2 NH--, --NHCH.sub.2 --, --CH.sub.2 CO--, --COCH.sub.2 --, --CH.sub.2 S-- and --SCH.sub.2 --; Ar.sup.1 is a phenylene moiety; Ar.sup.2 is a heteroaryl moiety; and wherein one or both of Ar.sup.1 and Ar.sup.2 may optionally bear one or more substituents independently selected from halogeno, hydroxy, amino, nitro, cyano, carboxy, carbamoyl, alkyl, alkenyl, alkynyl, alkoxy, alkylamino, di-alkylamino, N-alkylcarbamoyl, di-N,N-alkylcarbamoyl, alkoxycarbonyl, alkylthio, alkylsulphinyl, alkylsulphonyl, halogeno-alkyl, carboxyalkyl and alkanoylamino; provided that when R.sup.1 is hydroxy, X is not selected from --NHCH.sub.2 -- and --SCH.sub.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: February 3, 1998
    Assignee: Zeneca Limited
    Inventors: George Robert Brown, Keith Blakeney Mallion, Paul Robert Owen Whittamore, David Robert Brittain
  • Patent number: 5691349
    Abstract: Quinuclidine derivatives of formula, and their pharmaceutically acceptable salts, in which: R.sup.1 is hydrogen or hydroxy; R.sup.2 is hydrogen; pr R.sup.1 and R.sup.2 are joined together so that CR.sup.1 -CR.sup.2 is a double bond; X is selected from --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.dbd.C--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 NH--, NHCH.sub.2 --, --CH.sub.2 CO--, --COCH.sub.2 --, --CH.sub.2 S(O).sub.n -- and --S(O).sub.n CH.sub.2 -- wherein n is 0, 1 or 2; and AR is phenyl which may be optionally unsubstituted or substituted by one or more substituents such as halogeno, hydroxy, amino, nitro, cyano, carboxy, carbamoyl, alkyl, alkenyl, alkynyl, alkoxy, alkylamino, dialkylamino, N-alkylcarbamoyl, N,N-di-alkylcarbamoyl, alkoxycarbonyl, alkythio, alkylsulphinyl, alkylsulphonyl, halogeno alkyl, alkanoylamino, alkylenedioxy, alkanoyl and oxime derivatives thereof and O-alkyl ethers of said oximes; provided that when X is selected from --OCH.sub.2 --, --NHCH.sub.2 --, and SCH.sub.2 --, R.sup.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: November 25, 1997
    Assignee: Zeneca Limited
    Inventors: Keith Blakeney Mallion, George Robert Brown, Paul Robert Owen
  • Patent number: 5654315
    Abstract: Quinuclidine compounds of the formula I: ##STR1## R.sup.1 is hydrogen or hydroxy; R.sup.2 is hydrogen;or R.sup.1 and R.sup.2 are joined together so that CR.sup.1 --CR.sup.2 is a double bond;X is selected from --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --CH.sub.2 O--, --OCH.sub.2 --, --CH.sub.2 NH--, --NHCH.sub.2 --, --CH.sub.2 CO--, --COCH.sub.2 --, --CH.dbd.N--, --N.dbd.CH--, --CH.sub.2 S--, --SCH.sub.
    Type: Grant
    Filed: June 23, 1994
    Date of Patent: August 5, 1997
    Assignee: Imperial Chemical Industries PLC
    Inventors: George Robert Brown, Keith Blakeney Mallion, Peter John Harrison, deceased