Granted Patent
Utility
US 5,625,021 · App. 08/575,036
Method for the production of plastic particles
Inventors:
Markus Parusel, Werner Siol, Heinz Vetter
Patented Case
View Patent ↗
Granted: Apr 29, 1997
Filed: Dec 19, 1995
Inventors
Markus Parusel
Werner Siol
Heinz Vetter
Assignee (at issue)
Roehm GmbH Chemische Fabrik
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.