Granted Patent
Utility
US 4,550,140 · App. 06/591,545
Circuit board substrates prepared from poly(aryl ethers)s
Inventors:
Stephen B. Rimsa, James E. Harris, Herbert Chao, Louis M. Maresca
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Mar 20, 1984
Inventors
Stephen B. Rimsa
James E. Harris
Herbert Chao
Louis M. Maresca
Assignee (at issue)
Union Carbide Corporation
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.