Granted Patent
Utility
US 6,482,339 · App. 09/634,462
Process for stable widthwise regulation of bulb angle in extrusion of sheets of heat-sensitive plastics through a calender opening formed by intake rollers
Inventors:
Horst Greb, Erhard Haun, Karl Funk
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Aug 7, 2000
Inventors
Horst Greb
Erhard Haun
Karl Funk
Assignee (at issue)
ROEHM GMBH & CO. KG
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.