Granted Patent
Utility
US 4,954,638 · App. 07/227,038
Leukotriene by amides and hydrazides
Inventors:
Robert N. Young, Joshua Rokach, Edward C. Hayes
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Aug 1, 1988
Inventors
Robert N. Young
Joshua Rokach
Edward C. Hayes
Assignees (at issue)
Merck Frosst Canada Ltd.
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.