Granted Patent
Utility
US 4,985,290 · App. 07/481,036
Protective coatings for polyacetylenic recording media
Inventors:
David F. Lewis, Robert D. Schenfele, Thomas Winkler
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Feb 16, 1990
Inventors
David F. Lewis
Robert D. Schenfele
Thomas Winkler
Assignee (at issue)
GAF Chemicals 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.