Granted Patent
Utility
US 6,528,591 · App. 09/835,696
Process for preparing extrusion grade ABS polymer
Inventors:
Terry Virkler, Wan C. Wu
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Apr 16, 2001
Inventors
Terry Virkler
Wan C. Wu
Assignee (at issue)
Bayer Aktiengesellschaft
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.