Patents by Inventor Peter Dickinson

Peter Dickinson 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: 6136843
    Type: Grant
    Filed: October 7, 1999
    Date of Patent: October 24, 2000
    Assignee: Pfizer Inc
    Inventors: David James Rawson, Kevin Neil Dack, Roger Peter Dickinson, Kim James
  • Patent number: 6093731
    Abstract: Isoquinolinylguanidine compounds of formula (I): ##STR1## wherein the substituents are as defined herein, and salts thereof, are disclosed as urokinase inhibitors.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: July 25, 2000
    Inventors: Roger Peter Dickinson, Paul Vincent Fish, Christopher Gordon Barber
  • Patent number: 6040309
    Abstract: Compounds of formula I, ##STR1## wherein X represents O or S(O).sub.m ;R.sup.1 and R.sup.2 independently represent phenyl, naphthyl or heteroaryl; each of which is optionally fused and optionally substituted;Y represents a bond, O, (CH.sub.2).sub.n, O(CH.sub.2).sub.n, (CH.sub.2).sub.n O, or CH(C.sub.1-6 alkyl)O;R.sup.3 represents H or C.sub.1-6 alkyl;m represents 0, 1, or 2; andn represents 1, or 2;and pharmaceutically acceptable salts thereof, are useful in therapy, in particular in the treatment of restenosis, renal failure and pulmonary hypertension.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: March 21, 2000
    Assignee: Pfizer, Inc.
    Inventors: Kevin Neil Dack, Roger Peter Dickinson
  • Patent number: 6017945
    Abstract: Compounds of formula (I), and their pharmaceutically acceptable derivatives, wherein R.sup.1 and R.sup.2 are optional substituents and independently represent C.sub.1-6 alkyl, C.sub.2-6 alkenyl [optionally substituted by CO.sub.2 H or CO.sub.2 (C.sub.1-6 alkyl)], C.sub.2-6 alkynyl, halogen, C.sub.1-3 perfluoroalkyl, (CH.sub.2).sub.m Ar.sup.1, (CH.sub.2).sub.m Het.sup.1, (CH.sub.2).sub.m CONR.sup.7 R.sup.8, (CH.sub.2).sub.m CO.sub.2 R.sup.8, O(CH.sub.2).sub.q CO.sub.2 R.sup.8, (CH.sub.2).sub.m COR.sup.8, (CH.sub.2).sub.m OR.sup.8, O(CH.sub.2).sub.p OR.sup.8, (CH.sub.2).sub.m NR.sup.7 R.sup.8, CO.sub.2 (CH.sub.2).sub.q NR.sup.7 R.sup.8, (CH.sub.2).sub.m CN, S(O).sub.n R.sup.8, SO.sub.2 NR.sup.7 R.sup.8, CONH(CH.sub.2).sub.m Ar.sup.1 or CONH(CH.sub.2).sub.m Het.sup.1 ; R.sup.3 represents H, C.sub.1-6, alkyl, (CH.sub.2).sub.p NR.sup.9 R.sup.10, SO.sub.2 R.sup.10, SO.sub.2 NR.sup.9 R.sup.10, (CH.sub.2).sub.m COR.sup.10, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, (CH.sub.2).sub.m CONR.sup.9 R.sup.10, (CH.sub.2).sub.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: January 25, 2000
    Assignee: Pfizer Inc.
    Inventors: David James Rawson, Kevin Neil Dack, Roger Peter Dickinson, Kim James
  • Patent number: 5744488
    Abstract: Compounds of formula (I): ##STR1## and pharmaceutically acceptable salt and biolabile esters thereof, wherein R.sup.1 is H, C.sub.1 -C.sub.4 alkyl, phenyl optionally substituted by up to three substituents independently selected from C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy, halogen and CF.sub.3, or is 1-imidazolyl, 3-pyridyl or 4-pyridyl; R.sup.2 is H or C.sub.1 -C.sub.4 alkyl, R.sup.3 is SO.sub.2 R.sup.4 or COR.sup.4 where R.sup.4 is C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.3 perfluoroalkyl(CH.sub.2).sub.p, C.sub.3 -C.sub.6 cycloalkyl(CH.sub.2).sub.p, aryl(CH.sub.2).sub.p, or heteroaryl(CH.sub.2).sub.p, p being 0, 1 or 2, or R.sup.4 may be NR.sup.5 R.sup.6 where R.sup.5 is H or C.sub.1 -C.sub.4 alkyl and R.sup.6 is C.sub.1 -C.sub.6, alkyl, C.sub.3 -C.sub.6 cycloalkyl or aryl, or R.sup.5 and R.sup.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: April 28, 1998
    Assignee: Pfizer Inc.
    Inventors: Peter Edward Cross, Kevin Neil Dack, Roger Peter Dickinson, John Steele
  • Patent number: 5705523
    Abstract: Compounds of formula: ##STR1## or a biolabile ester thereof, or a pharmaceutically acceptable salt of either,whereinR.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each independently selected from H or C.sub.1 -C.sub.4 alkyl;R.sup.5 is (CH.sub.2).sub.m SO.sub.2 R.sup.6, (CH.sub.2).sub.m NHSO.sub.2 R.sup.6 or (CH.sub.2).sub.m NHCOR.sup.7 ;R.sup.6 and R.sup.7 are C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.3 perfluoroalkyl-(CH.sub.2).sub.n, C.sub.3 -C.sub.6 cycloalkyl(CH.sub.2).sub.n, aryl(CH.sub.2).sub.n or heteroaryl(CH.sub.2).sub.n ; orR.sup.6 is NR.sup.8 R.sup.9 ;R.sup.8 is H or C.sub.1 -C.sub.4 alkyl;R.sup.9 is C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 cycloalkyl(CH.sub.2).sub.n, aryl(CH.sub.2).sub.n or heteroaryl(CH.sub.2).sub.n ; orR.sup.8 and R.sup.9 together with the nitrogen atom to which they are attached from a 5- to 7-membered heterocyclic ring;X is CH.sub.2, CHCH.sub.3, C(OH)CH.sub.3, C.dbd.CH.sub.2 or O;m is 0 or 1;n is 0, 1, 2 or 3; andHet is 3- or 4-pyridyl or 1-imidazolyl;are combined thromboxane A.sub.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: January 6, 1998
    Assignee: Pfizer Inc.
    Inventors: Roger Peter Dickinson, Kevin Neil Dack, John Steele
  • Patent number: 5332651
    Abstract: Photopolymerizable grafted polyvinyl alcohols including groups of formula ##STR1## wherein n represents zero or an integer from 1 to 6, m represents zero or 1 (with the proviso that m represents zero when n represents zero), Z together with the nitrogen and carbon atoms to which they are attached represent a heterocyclic ring optionally fused to one or more benzenoid or heterocyclic rings, X.sup.- represents an anion, R' represents an alkyl group, and p represents an integer from 1 to 4. Compositions containing such grafted polyvinyl alcohols, for example for screen printing stencils, have shown high sensitivity to light.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: July 26, 1994
    Assignee: Sericol Limited
    Inventors: Peter Dickinson, Julie E. Pratt, Fereidoun Abbasi
  • Patent number: 5061603
    Abstract: Photopolymerizable polyvinyl alcohols including a group of formula ##STR1## wherein R.sub.1 represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group, or a hydrogen atom; R.sub.2 represents a substituted or unsubstituted alkyl group, a primary, secondary or tertiary amino group, a cyano, hydroxy or nitro group, a halogen or hydrogen atom or, together with the pyridine ring to which it is attached, part of a quinolyl group; R.sub.3 represents a chlorine or hydrogen atom or, together with the benzene ring to which it is attached, part of a naphthyl group; and X.sup.- represents an anion, and photocurable compositions for producing screen printing stencils including such polyvinyl alcohol derivatives. Compositions of the invention show high light sensitivity with low levels of photocrosslinkable groups grafted to the polyvinyl alcohol.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: October 29, 1991
    Assignee: Sericol Group Limited
    Inventors: John Hamilton, Peter Dickinson
  • Patent number: 4960671
    Abstract: This invention relates to a screen printing stencil composition which comprises (a) a stabilized aqueous dispersion of a water insoluble addition copolymer having units of formulas: A and B where A is preferably a polyvinyl acetate group and B is preferably a polyvinyl n-methylol acrylamide group and B comprises about 3% by weight of the copolymer; (b) a water soluble colloid; and (c) a photosensitizer: The composition is useful in the formation of a screen printing stencil, the composition having both a long stable profile and forming a durable stencil; the composition on exposure through a photographic positive can be developed with water and cross-linked with acid.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: October 2, 1990
    Inventor: Peter Dickinson
  • Patent number: 4659649
    Abstract: The invention provides new compositions which change color on exposure to actinic radiation and contain a photosensitive onium, e.g. iodonium or sulphonium, salt and a dyestuff which changes color when protonated. The compositions may also include a resin, especially a resin curable by the onium salt when the latter is exposed, and preferably an epoxy resin. The compositions are useful especially as coatings, e.g. for making screen stencils or for producing lithographic printing plates.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: April 21, 1987
    Assignee: Sericol Group Limited
    Inventors: Peter Dickinson, Michael Ellwood
  • Patent number: 4548890
    Abstract: Aqueous dispersions comprising water, a cationically curable compound, and a photosensitive onium salt, and preferably other ingredients such as sensitizers, fillers, and plasticizers, are useful for making printing screens, lithographic plates, and printed circuit resists. After exposure, the un-cured composition is easily removed by washing with water.
    Type: Grant
    Filed: March 30, 1984
    Date of Patent: October 22, 1985
    Assignee: Sericol Group Limited
    Inventors: Peter Dickinson, Michael Ellwood