Granted Patent
Utility
US 4,631,200 · App. 06/734,996
Graphite composite chips
Inventor:
Thomas R. Bierschenk
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: May 17, 1985
Inventor
Thomas R. Bierschenk
Assignee (at issue)
THE DOW CHEMICAL COMPANY
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.