Granted Patent
Utility
US 4,954,655 · App. 07/331,925
Preparation of alkylhydrazines
Inventor:
Martha J. Kelly
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Mar 31, 1989
Inventor
Martha J. Kelly
Assignee (at issue)
Rohm and Haas Company
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.