Granted Patent
Utility
US 5,697,402 · App. 08/623,952
Apparatus for melt mixing synthetic polymers
Inventors:
John A. Hodan, Matthew B. Hoyt, Otto M. Ilg
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Mar 29, 1996
Inventors
John A. Hodan
Matthew B. Hoyt
Otto M. Ilg
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.