Granted Patent
Utility
US 6,503,628 · App. 09/538,649
Thermoplastic polycarbonate molding composition containing a rubber free copolymer and a combination of graft polymers
Inventors:
Venkatarayaloo Janarthanan, Roland P. Brassard, Karl-Erwin Piejko, Sara D. Graham
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Mar 30, 2000
Inventors
Venkatarayaloo Janarthanan
Roland P. Brassard
Karl-Erwin Piejko
Sara D. Graham
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.