Granted Patent
Utility
US 4,581,996 · App. 06/357,926
Aluminum support useful for lithography
Inventor:
Stephan J. W. Platzer
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Mar 15, 1982
Inventor
Stephan J. W. Platzer
Assignee (at issue)
American Hoechst 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.