Granted Patent
Utility
US 4,663,356 · App. 06/776,286
Polyvinyl chloride extrudate produced from spherical polyvinyl chloride particles
Inventor:
Kornelius Dinbergs
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Sep 16, 1985
Inventor
Kornelius Dinbergs
Assignee (at issue)
B. F. Goodrich 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.