Patents by Inventor Ashok Gopal Chaudhary

Ashok Gopal Chaudhary 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).

  • 2-debenzoyl-2-acyl taxol derivatives and method for making same
    Patent number: 6002023
    Abstract: The present invention relates to 2-debenzoyl-2-acyl taxol derivatives, analogues thereof and methods for making same.Compounds of the present invention include compounds having the general formula: ##STR1## wherein R.sub.1 is an alkyl or substituted alkyl; R.sub.2 is selected from the group consisting of H and C(O)R.sub.a ; R.sub.3 is selected from the group consisting of H, protecting groups, R.sub.b, and C(O)R.sub.b ; R.sub.4 is selected from the group consisting of H and C(O)R.sub.c, and wherein R.sub.a, R.sub.b, and R.sub.c are independently selected from the group consisting of alkyls, substituted alkyls, alkenyls, alkynyls, aryls, and substituted aryls; provided that R.sub.a is other than phenyl and 3-hydroxyphenyl.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: December 14, 1999
    Assignee: Virginia Tech Intellectural Properties, Inc.
    Inventors: David G. I. Kingston, Ashok Gopal Chaudhary, Milind Moreshwar Gharpure, John Matthew Rimoldi, A.A. Leslie Gunatilaka
  • 2-Debenzoyl-2-acyl taxol derivatives and methods for making same
    Patent number: 5703247
    Abstract: Compounds having the general formula: ##STR1## wherein R.sub.1 is an alkyl or substituted alkyl; R.sub.2 is selected from the group consisting of H and C(O)R.sub.a ; R.sub.3 is selected from the group consisting of H, protecting groups, R.sub.b, and C(O)R.sub.b ; R.sub.4 is selected from the group consisting of H and C(O)R.sub.c, and wherein R.sub.a, R.sub.b, and R.sub.c are independently selected from the group consisting of alkyls, substituted alkyls, alkenyls, alkynyls, aryls, and substituted aryls; provided that R.sub.a is other than phenyl and 3-hydroxyphenyl.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: December 30, 1997
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: David G. I. Kingston, Ashok Gopal Chaudhary, Milind Moreshwar Gharpure, John Matthew Rimoldi, A. A. Leslie Gunatilaka