Granted Patent
Utility
US 5,002,852 · App. 07/232,838
Recording medium of improved stability
Inventors:
David F. Lewis, Mark L. Moskowitz, Steward E. Purdy
Patented Case
View Patent ↗
Granted: Mar 26, 1991
Filed: Jun 20, 1988
Inventors
David F. Lewis
Mark L. Moskowitz
Steward E. Purdy
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.