Granted Patent
Utility
US 5,830,875 · App. 07/429,919
24-and 25-substituted avermectin and milbemycin derivatives
Inventors:
Helmut Mrozik, Thomas L. Shih
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Oct 30, 1989
Inventors
Helmut Mrozik
Thomas L. Shih
Assignee (at issue)
MERCK & CO., INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.