Granted Patent
Utility
US 5,235,821 · App. 07/999,606
Method and apparatus for refrigerant recovery
Inventors:
Christophe J. P. Sevrain, Bonnie C. Lambert
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Dec 31, 1992
Inventors
Christophe J. P. Sevrain
Bonnie C. Lambert
Assignee (at issue)
Micropump, Inc.
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.