Granted Patent
Utility
US 4,707,299 · App. 06/570,939
Solution useful in making carbon-metal phosphate composite
Inventor:
Michael John Block
Patented Case
View Patent ↗
Granted: Nov 17, 1987
Filed: Jan 16, 1984
Inventor
Michael John Block
Assignee (at issue)
Union Oil Company of California
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.