Granted Patent
Utility
US 4,604,427 · App. 06/756,534
Method of forming electrically conductive polymer blends
Inventors:
William P. Roberts, Leslie A. Schulz
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Jul 19, 1985
Inventors
William P. Roberts
Leslie A. Schulz
Assignee (at issue)
W. R. Grace & Co.
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.