Patents by Inventor Philip Ma

Philip Ma 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).

  • Processes and intermediate compounds for the preparation of platelet glycoprotein IIb/IIIa inhibitors
    Patent number: 5817749
    Abstract: This invention provides processes for the synthesis of platelet glycoprotein IIb/IIIa inhibitors and intermediate compounds useful in said processes.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: October 6, 1998
    Assignee: DuPont Pharmaceuticals Company
    Inventors: Lin-Hua Zhang, Philip Ma, William Frank DeGrado
  • 2-amino-1, 4-dihydropyridine derivatives with calcium agonist and alpha.sub. -antagonist activity
    Patent number: 5314887
    Abstract: There are provided novel 1,4-dihydropyridine compounds possessing both calcium agonist and alpha.sub.1 -antagonist activity useful for treating congestive heart failure, pharmaceutical compositions containing them and methods of using these compounds to treat congestive heart failure in a mammal.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: May 24, 1994
    Assignee: The Du Pont Merck Pharmaceutical Company
    Inventors: Paul E. Aldrich, Richard A. Earl, Philip Ma
  • 2-amino-1,4-dihydropyridine derivatives with calcium agonist and alpha.sub.1 -antagonist activity
    Patent number: 5166148
    Abstract: There are provided novel 1,4-dihydropyridine compounds possessing both calcium agonist and alpha.sub.1 -antagonist activity useful for treating congestive heart failure, pharmaceutical compositions containing them and methods of using these compounds to treat congestive heart failure in a mammal.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: November 24, 1992
    Assignee: The Du Pont Merck Pharmaceutical Company
    Inventors: Paul E. Aldrich, Richard A. Earl, Philip Ma
  • 1,4-dihydropyridine derivatives with calcium agonist and alpha.sub.1 -antagonist activity
    Patent number: 4868181
    Abstract: 1,4-Dihydropyridine derivatives which combine both calcium agonist and alpha.sub.1 -antagonist activity are useful in treating congestive heart failure. These derivatives are compounds having the formula: ##STR1## wherein Ar, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are defined in the specification.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: September 19, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Alexander L. Johnson, Philip Ma, Petrus B. M. W. M. Timmermans, Ruth R. Wexler