Granted Patent
Utility
US 5,229,416 · App. 07/875,486
Avermectin difluoro derivatives
Inventors:
Peter T. Meinke, Helmut Mrozik, Michael H. Fisher
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Apr 29, 1992
Inventors
Peter T. Meinke
Helmut Mrozik
Michael H. Fisher
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.