Granted Patent
Utility
US 4,618,441 · App. 06/674,287
Metalworking with a lubricant composition comprising mineral oil and alkoxyalkyl ester
Inventor:
Mei-Yuan Tsai
Patented Case
View Patent ↗
Granted: Oct 21, 1986
Filed: Nov 23, 1984
Inventor
Mei-Yuan Tsai
Assignee (at issue)
Aluminum Company of America
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.