Granted Patent
Utility
US 4,338,443 · App. 06/178,339
Synthesis of N-(2-hydroxyethyl)piperazine
Inventors:
Michael E. Brennan, George P. Speranza
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Aug 15, 1980
Inventors
Michael E. Brennan
George P. Speranza
Assignee (at issue)
Texaco 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.