Granted Patent
Utility
US 4,428,866 · App. 06/409,686
Composition for reducing fly ash resistivity
Inventors:
Richard L. Every, Franklin D. Lewandowski, Jerome F. Lech
Patented Case
View Patent ↗
Granted: Jan 31, 1984
Filed: Aug 19, 1982
Inventors
Richard L. Every
Franklin D. Lewandowski
Jerome F. Lech
Assignee (at issue)
Dearborn Chemical Company Limited
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.