Granted Patent
Utility
US 4,374,939 · App. 06/108,534
Mold wash composition
Inventors:
James Van Fisk, Jr., John W. Jordan
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: Dec 31, 1979
Inventors
James Van Fisk, Jr.
John W. Jordan
Assignee (at issue)
NL Industries, 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.