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: 5608090
    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: March 4, 1997
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis M. Sobieray, Lloyd C. Franklin, Mark A. Schwindt
  • Patent number: 5599973
    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: February 4, 1997
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis M. Sobieray, Lloyd C. Franklin, Mark A. Schwindt
  • Patent number: 5563175
    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: October 8, 1996
    Assignees: Northwestern University, Warner-Lambert Company
    Inventors: Richard B. Silverman, Ryszard Andruszkiewicz, Po-Wai Yuen, Denis M. Sobieray, Lloyd C. Franklin, Mark A. Schwindt
  • Patent number: 5554767
    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: May 21, 1993
    Date of Patent: September 10, 1996
    Assignee: Warner-Lambert Company
    Inventors: Kevin K. Wang, Po-Wai Yuen
  • Patent number: 5284862
    Abstract: The present invention relates to novel 3-substituted-2-carboxyindoles; including as 3-substituents amides of hydroxamic acids and derivatives thereof or urea and carbonyl, carboxyl or phosphonic acids or ester amides, or 2-acylsulfonamides thereof; and including also as 3-substituents unsaturated acids and their further ester and amide derivatives. These 2-carboxyindoles are useful as pharmaceutical agents, therefore, the present invention is also pharmaceutical compositions and pharmaceutical methods of treatment therefor. The compounds of the present invention are useful in the treatment of neurodegenerative disorders including cerebrovascular disorders.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: February 8, 1994
    Assignee: Warner-Lambert Company
    Inventors: Christopher F. Bigge, Graham Johnson, Po-Wai Yuen
  • Patent number: 5145845
    Abstract: The present invention relates to novel compounds, which are derivatives of ureas, thioureas, carbamates, sulfonylureas, sulfonamides, amides, and thioamides of 2-carboxyindoles as illustrated by the formula ##STR1## The invention also relates to methods for the preparation of the novel compounds, as well as to pharmaceutical compositions or methods of use for the novel compounds. More specifically, the compounds of the present invention are useful in the treatment of neurodegenerative disorders including cerebrovascular disorders as well as in the treatment of schizophrenia or epilepsy; and as analgesics and anxiolytics.
    Type: Grant
    Filed: May 14, 1991
    Date of Patent: September 8, 1992
    Assignee: Warner-Lambert Co.
    Inventors: Graham Johnson, Thomas C. Malone, Po-Wai Yuen