Granted Patent
Utility
US 4,615,771 · App. 06/818,519
Method of separating bis-(2-aminoethyl)ether from N-(2-methoxyethyl)morpholine by azeotropic distillation and extraction
Inventors:
Robert L. Zimmerman, Roger G. Duranleau
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Jan 13, 1986
Inventors
Robert L. Zimmerman
Roger G. Duranleau
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.