Granted Patent
Utility
US 5,204,045 · App. 07/715,459
Process for extruding polymer shapes with smooth, unbroken surface
Inventors:
Gregory J. Courval, Dermot R. M. Thomas, Steven G. Allen
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Jun 14, 1991
Inventors
Gregory J. Courval
Dermot R. M. Thomas
Steven G. Allen
Assignee (at issue)
Symplastics Limited
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.