Granted Patent
Utility
US 5,252,474 · App. 07/490,723
Cloning genes from Streptomyces avermitilis for avermectin biosynthesis and the methods for their use
Inventors:
Keith M. Gewain, Douglas J. MacNeil, Tanya MacNeil, Philip S. Paress, Carolyn L. Ruby, Stanley L. Streicher
Patented Case
View Patent ↗
Granted: Oct 12, 1993
Filed: Mar 14, 1990
Inventors
Keith M. Gewain
Douglas J. MacNeil
Tanya MacNeil
Philip S. Paress
Carolyn L. Ruby
Stanley L. Streicher
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.