Granted Patent
Utility
US 4,347,381 · App. 05/871,811
Method of treating long chain alkyl amines or products derived therefrom
Inventor:
Melvin E. Tuvell
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Jan 24, 1978
Inventor
Melvin E. Tuvell
Assignee (at issue)
Ethyl Corporation
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.