Granted Patent
Utility
US 4,259,451 · App. 06/161,625
Organism ATCC 31643
Inventors:
Suzanna M. Steenbergen, Kevin Young
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Jun 20, 1980
Inventors
Suzanna M. Steenbergen
Kevin Young
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.