Granted Patent
Utility
US 5,202,309 · App. 07/749,633
Antibiotic cyclopeptide fermentation product
Inventors:
Robert E. Schwartz, Jerrold M. Liesch, Raymond F. White, Otto D. Hensens, Henry Joshua, Dennis M. Schmatz
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Aug 19, 1991
Inventors
Robert E. Schwartz
Jerrold M. Liesch
Raymond F. White
Otto D. Hensens
Henry Joshua
Dennis M. Schmatz
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.