Granted Patent
Utility
US 4,604,156 · App. 06/690,330
Method of fabricating a cylindrical multilayer screen
Inventors:
Garland E. Raley, Dean M. Spear
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Jan 10, 1985
Inventors
Garland E. Raley
Dean M. Spear
Assignee (at issue)
Ethyl 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.