Granted Patent
Utility
US 5,599,402 · App. 08/107,712
Method for cleaning plate heat exchangers
Inventors:
Folmer Greve, Christian Stutz
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Aug 12, 1993
Inventors
Folmer Greve
Christian Stutz
Assignee (at issue)
Novo Nordisk A/S
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.