Granted Patent
Utility
US 5,082,429 · App. 07/573,904
Peristaltic pump
Inventors:
Charles E. Soderquist, Steven P. Hellstrom
Patented Case
View Patent ↗
Granted: Jan 21, 1992
Filed: Aug 28, 1990
Inventors
Charles E. Soderquist
Steven P. Hellstrom
Assignee (at issue)
COLE-PARMER INSTRUMENT COMPANY LLC
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.