Granted Patent
Utility
US 5,759,689 · App. 08/664,034
Coextruded polycarbonate sheet with improved weathering
Inventor:
Ronald F. Sieloff
Patented Case
View Patent ↗
Granted: Jun 2, 1998
Filed: Jun 13, 1996
Inventor
Ronald F. Sieloff
Assignee (at issue)
General Electric Company
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.