Granted Patent
Utility
US 5,961,734 · App. 08/868,535
Methods for purging process lines of additives for thermoplastic materials
Inventors:
Daniel H. Kight, Carl R. Holzer, Jr., Dan R. Yon
Patented Case
View Patent ↗
Granted: Oct 5, 1999
Filed: Jun 4, 1997
Inventors
Daniel H. Kight
Carl R. Holzer, Jr.
Dan R. Yon
Assignee (at issue)
BASF SE
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.