Patents by Inventor Christopher Williamson

Christopher Williamson 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).

  • Publication number: 20080127845
    Abstract: A method for operating a pad printing system includes receiving a removable pre-filled ink cup on a doctor assembly, orienting the removable pre-filled ink filled cup on the doctor assembly, and dispensing ink from the oriented removable pre-filled ink cup. A removable pre-filled ink cup is provided for a pad printing system including an ink retention portion pre-filled with ink, and a doctor assembly orientation portion formed on an outer portion of the retention portion, wherein the removable pre-filled ink cup is configured to deposit ink on a cliché device via a doctor assembly mated with the doctor assembly orientation portion.
    Type: Application
    Filed: October 30, 2007
    Publication date: June 5, 2008
    Inventors: CHRISTOPHER SCHAAFSMA, Sigi Knappik, Christopher Williamson
  • Publication number: 20050250950
    Abstract: (?)-4-Amino-1-(2-hydroxymethyl-1,3-oxathiolan-5-yl)-(1H)-pyrimidin-2-one, its pharmaceutically acceptable derivatives, pharmaceutical formulations thereof, methods for its preparation and its use as an antiviral agent are described.
    Type: Application
    Filed: July 18, 2005
    Publication date: November 10, 2005
    Inventors: Jonathan Coates, Ian Mutton, Charles Penn, Christopher Williamson, Richard Storer
  • Publication number: 20030004175
    Abstract: (−)-4-amino-1-(2-hydroxymethyl-1,3-oxathiolan-5-yl)-(1H)-pyrimidin-2-one, its pharmaceutically acceptable derivatives, pharmaceutical formulation thereof, methods for its preparation and its uses as an antiviral agent are described
    Type: Application
    Filed: January 30, 2001
    Publication date: January 2, 2003
    Applicant: BioChem Pharma Inc.
    Inventors: Jonathan Allan Coates, Ian Martin Mutton, Charles Richard Penn, Christopher Williamson, Richard Storer
  • Publication number: 20020037865
    Abstract: Acetamido-2,3,4,5-tetradeoxy-4-guanidino-D-glycero-D-galacto-non-2-enopyranosonic acid in crystaline form, particularly in the form of a hydrate which exists as crystals having a low aspect ratio, or in the form of a hydrate which exists as crystals having a high aspect ratio.
    Type: Application
    Filed: September 24, 2001
    Publication date: March 28, 2002
    Inventors: Christopher Williamson, William James White, Vipulkumar Patel
  • Patent number: 6294572
    Abstract: Two useful crystal hydrates of 5-acetamido-2,3,4,5-tetradeoxy-4-guanidino-D-glycero-D-galacto-non-2-enopyranosonic acid have either a low or high aspect ratio. These crystalline N-acetyl neurominic acid derivatives are favored for pharmaceutical formulation because of their physical properties. For example, the low aspect ratio crystal has good flow properties, and the high aspect ratio crystal has a stable water content over time.
    Type: Grant
    Filed: July 2, 1999
    Date of Patent: September 25, 2001
    Assignee: Biota Scientific Management Pty Ltd.
    Inventors: Christopher Williamson, William James White, Vipulkumar Patel
  • Patent number: 6180639
    Abstract: (−)-4-amino-1-(2-hydroxymethyl-1,3-oxathiolan-5-yl)-(1H)-pyrimidin-2-one, its pharmaceutically acceptable derivatives, pharmaceutical formulation thereof, methods for its preparation and its uses as an antiviral agent are described.
    Type: Grant
    Filed: February 20, 1992
    Date of Patent: January 30, 2001
    Assignee: BioChem Pharma Inc.
    Inventors: Jonathan Allan Coates, Ian Martin Mutton, Charles Richard Penn, Christopher Williamson, Richard Storer
  • Patent number: 5597933
    Abstract: The invention provides a method for the preparation of the compound of formula(I) ##STR1## which comprises catalytic hydrogenolysis of a compound of formula (II) ##STR2## (wherein R is H or a C.sub.1-4 alkyl group and R.sup.1 is H or a hydroxyl protecting group for example an acyl group such as acetyl) in aqueous formic acid followed, where necessary, by hydrolysis.
    Type: Grant
    Filed: March 8, 1996
    Date of Patent: January 28, 1997
    Assignee: Biota Scientific Management Pty. Ltd.
    Inventors: Andrew D. Searle, Christopher Williamson
  • Patent number: 4650800
    Abstract: Compounds of the general formula: ##STR1## wherein X represents a halogen atom or a trifluoromethyl group; R.sup.1 represents a hydrogen atom or a lower alkyl group and Het represents an optionally substituted C-attached 5-7 membered aromatic heterocyclic ring which ring contains one or more heteroatoms selected from O, N and S and optionally carries a fused ring and where an acidic or basic group is present, the salts thereof have been found to possess excellent metaphase arresting ability and are of use in combating abnormal cell proliferation. Thus a knowledge of the cell division cycles of the normal and abnormal cells enables a cytotoxic drug to be administered while the abnormal cells are in a phase susceptible to attack and while the normal cells are in a non-susceptible phase.The compounds of the invention are prepared by alkylation, deprotection of a protected keto group, oxidation or electrophilic halogenation.
    Type: Grant
    Filed: May 19, 1983
    Date of Patent: March 17, 1987
    Assignee: Glaxo Group Limited
    Inventors: Gordon H. Phillipps, Christopher Williamson, Ian P. Steeples, Brian M. Bain, Raymond A. Borella
  • Patent number: 4636509
    Abstract: Compounds of the general formula: ##STR1## (wherein X represents a halogen atom or a trifluoromethyl group; R.sup.1 represents an optionally substituted C.sub.6-10 carbocyclic aromatic group; and R.sup.2 represents a hydrogen atom or a lower alkyl, C.sub.7-16 aralkyl or C.sub.6-10 aryl group or the group COR.sup.1a, in which R.sup.1a is as defined for R.sup.1, R.sup.1 and R.sup.1a being the same or different) and where an acidic or basic group is present, the salts thereof have been found to possess excellent metaphase arresting ability and are of use in combating abnormal cell proliferation. Thus a knowledge of the cell division cycles of the normal and abnormal cells enables a cytotoxic drug to be administered while the abnormal cells are in a phase susceptible to attack and while the normal cells are in a non-susceptible phase.The compounds of the invention are prepared by alkylation, deprotection of a protected keto group, oxidation or electrophilic halogenation.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: January 13, 1987
    Assignee: Glaxo Group Limited
    Inventors: Gordon H. Phillipps, Christopher Williamson
  • Patent number: 4335121
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1 represents a fluoro-, chloro- or bromo-methyl group or a 2'-fluoroethyl group, R.sup.2 represents a group COR.sup.6 where R.sup.6 is a C.sub.1-3 alkyl group or OR.sup.2 and R.sup.3 together form a 16.alpha.,17.alpha.-isopropylidenedioxy group; R.sup.3 represents a hydrogen atom, a methyl group (which may be in either the .alpha.- or .beta.-configuration) or a methylene group; R.sup.4 represents a hydrogen, chlorine or fluorine atom; R.sup.5 represents a hydrogen or fluorine atom and symbol represents a single or double bond have good anti-inflammatory activity, particularly on topical applications.The compounds of formula I are prepared by esterification, halogenation, reduction, deprotection and reaction at a 9,11-double bond to form a 9.alpha.-halo-11.beta.-hydroxy grouping.Pharmaceutical compositions containing the compounds of formula I and methods for the use of the compounds are described and claimed.
    Type: Grant
    Filed: February 13, 1981
    Date of Patent: June 15, 1982
    Assignee: Glaxo Group Limited
    Inventors: Gordon H. Phillipps, Brian M. Bain, Ian P. Steeples, Christopher Williamson