Granted Patent
Utility
US 4,634,469 · App. 06/714,538
Parting composition comprising glycerol trioleate, castor oil and copper corrosion inhibitor
Inventors:
Joseph T. Laemmle, John Bohaychick, Willie Lansdale
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Mar 21, 1985
Inventors
Joseph T. Laemmle
John Bohaychick
Willie Lansdale
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.