Granted Patent
Utility
US 5,452,586 · App. 08/308,375
Method for flushing a refrigeration system
Inventor:
Sibtain Hamid
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Sep 19, 1994
Inventor
Sibtain Hamid
Assignee (at issue)
Huls America 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.