Patents by Inventor Po-Wai Yuen

Po-Wai Yuen 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: 6525096
    Abstract: A compound of the formula wherein R1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R2 is hydrogen or methyl; and R3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: February 25, 2003
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 6414024
    Abstract: A compound of the formula wherein R1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R2 is hydrogen or methyl; and R3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: July 2, 2002
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 6359169
    Abstract: A compound of the formula wherein R1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R2 is hydrogen or methyl; and R3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: March 19, 2002
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 6342529
    Abstract: A compound of the formula wherein R1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R2 is hydrogen or methyl; and R3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: January 29, 2002
    Assignees: Northwestern University, Pfizer, Inc.
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 6291526
    Abstract: A compound of the formula wherein R1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R2 is hydrogen or methyl; and R3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: September 18, 2001
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen
  • Patent number: 6255345
    Abstract: A compound of the formula wherein R1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R2 is hydrogen or methyl; and R3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: July 3, 2001
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 6140366
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is a straight branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R.sub.2 is hydrogen or methyl; and R.sub.3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: October 31, 2000
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen
  • Patent number: 6124280
    Abstract: The present invention relates to novel substituted phenols and derivatives thereof useful in the treatment of neurological disorders. Methods of preparing the compounds, intermediates useful in the preparation and pharmaceutical compositions containing the compounds are also includes.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: September 26, 2000
    Assignee: Warner-Lambert Company
    Inventors: Thomas C. Malone, Robert M. Schelkun, Po-Wai Yuen
  • Patent number: 6124323
    Abstract: Novel 4-substituted piperidine analogs, pharmaceutical compositions containing the same and the method of using 4-substituted piperidine analogs are selective active antagonists of N-methyl-D-aspartate (NMDA) receptor subtypes for treating conditions such as stroke, cerebral ischemia, central nervous system trauma, hypoglycemia, psychosis, anxiety, migraine headaches, glaucoma, CMV retinitis, aminoglycoside antibiotics-induced hearing loss, convulsions, chronic pain, opioid tolerance or withdrawal, urinary incontinence or neurodegenerative disorders, such as lathyrism, Alzheimer's Disease, Parkinsonism and Huntington's Disease are described.
    Type: Grant
    Filed: September 16, 1998
    Date of Patent: September 26, 2000
    Assignees: Warner-Lambert Company, Cocensys, Incorporated
    Inventors: Christopher F. Bigge, Po-Wai Yuen, Sui Xiong Cai, Eckard Weber, Richard Woodward, Nancy C. Lan, Zhang-Lin Zhou, John F. W. Keana, Anthony P. Guzikowski
  • Patent number: 6117906
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R.sub.2 is hydrogen or methyl; and R.sub.3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: September 12, 2000
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 6110911
    Abstract: A novel series of substituted quinoxaline 2,3-diones useful as neuroprotective agents are taught. Novel intermediates, processes of preparation, and pharmaceutical compositions containing the compounds are also taught. The compounds are glutamate antagonists and are useful in the treatment of stroke, cerebral ischemia, or cerebral infarction resulting from thromboembolic or hemorrhagic stroke, cerebral vasospasms, hypoglycemia, cardiac arrest, status epilepticus, perinatal asphyxia, anoxia, seizure disorders, pain, Alzheimer's, Parkinson's, and Huntington's Diseases.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: August 29, 2000
    Assignee: Warner-Lambert Company
    Inventors: Brian Edward Kornberg, Sham Shridhar Nikam, Michael Francis Rafferty, Po-Wai Yuen
  • Patent number: 6028214
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R.sub.2 is hydrogen or methyl; and R.sub.3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are also disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are further disclosed.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: February 22, 2000
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 5932573
    Abstract: The present invention relates to novel substituted quinolines and isoquinolines and derivatives thereof useful in the treatment of neurological disorders. Methods of preparing the compounds, intermediates useful in the preparation and pharmaceutical compositions containing the compounds are also included. The compounds are useful in treating pain, cerebral ischemia, and other cerebrovascular disorders.
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: August 3, 1999
    Assignee: Warner-Lambert Company
    Inventor: Po-Wai Yuen
  • Patent number: 5874426
    Abstract: A novel series of substituted quinoxaline 2,3-diones of Formula I ##STR1## useful as neuroprotective agents are taught. Novel intermediates, processes of preparation, and pharmaceutical compositions containing the compounds are also taught. The compounds are glutamate antagonists and are useful in the treatment of stroke, cerebral ischemia, or cerebral infarction resulting from thromboembolic or hemorrhagic stroke, cerebral vasospasms, hypoglycemia, cardiac arrest, status epilepticus, perinatal asphyxia, anoxia, seizure disorders, pain, Alzheimer's, Parkinson's, and Huntington's Diseases.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 23, 1999
    Assignee: Warner-Lambert Company
    Inventors: Brian Edward Kornberg, Sham Nikam, Michael Francis Rafferty, Po-Wai Yuen
  • Patent number: 5847151
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R.sub.2 is hydrogen or methyl; and R.sub.3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: December 8, 1998
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 5767129
    Abstract: The present invention relates to novel substituted quinolines and isoquinolines and derivatives thereof useful in the treatment of neurological disorders. Methods of preparing the compounds, intermediates useful in the preparation and pharmaceutical compositions containing the compounds are also included. The compounds are useful in treating pain, cerebral ischemia, and other cerebrovascular disorders.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: June 16, 1998
    Assignee: Warner-Lambert Company
    Inventor: Po-Wai Yuen
  • Patent number: 5760048
    Abstract: The invention covers a novel series of .alpha.-mercaptoacrylic acid derivatives that inhibit both calpain I and calpain II with a high affinity and selectivity. The compounds are useful in the treatment of neurodegenerative disorders including cerebrovascular disorders, brain injury, spinal cord, and peripheral nerve injury, cardiac infarction, cataracts, inflammation, restenosis, muscular dystrophy, and platelet aggregation. Pharmaceutical compositions, methods of using processes for preparing and novel intermediates useful in the processes are also disclosed.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: June 2, 1998
    Assignee: Warner-Lambert Company
    Inventors: Kevin Ka-Wang Wang, Po-Wai Yuen
  • Patent number: 5710304
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R.sub.2 is hydrogen or methyl; and R.sub.3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: January 20, 1998
    Assignee: Northwestern University
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 5684189
    Abstract: A compound of the formula ##STR1## wherein R.sub.1 is a straight or branched alkyl group having from 1 to 6 carbon atoms, phenyl, or cycloalkyl having from 3 to 6 carbon atoms; R.sub.2 is hydrogen or methyl; and R.sub.3 is hydrogen, methyl or carboxyl; which is useful in the treatment of seizure disorders. Processes are disclosed for the preparation of the compound. Intermediates prepared during the synthesis of the compound are also disclosed.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: November 4, 1997
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis Martin Sobieray, Lloyd Charles Franklin, Mark Alan Schwindt
  • Patent number: 5679680
    Abstract: The invention covers a novel series of .alpha.-substituted hydrazides that inhibit both calpain I and calpain II. They are non-peptide irreversible active site inhibitors of calpain. The compounds are useful in the treatment of neurodegenerative disorders including cerebrovascular disorders, brain injury, spinal cord, and peripheral nerve injury, cardiac infarction, cataracts, inflammation, restenosis, muscular dystrophy, and platelet aggregation. Pharmaceutical compositions, methods of using processes for preparing and novel intermediates useful in the processes are also disclosed.
    Type: Grant
    Filed: February 16, 1995
    Date of Patent: October 21, 1997
    Assignee: Warner-Lambert Company
    Inventors: Kevin Ka-Wang Wang, Po-Wai Yuen