Granted Patent
Utility
US 6,004,476 · App. 08/944,737
Corrosion inhibiting solutions and processes for refrigeration systems comprising heteropoly complex anions of transition metal elements additional additives
Inventors:
Shyam Kumar Verma, Manuel Sarkis Mekhjian, George Robert Sandor, Philip John Boon
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Oct 6, 1997
Inventors
Shyam Kumar Verma
Manuel Sarkis Mekhjian
George Robert Sandor
Philip John Boon
Assignee (at issue)
FMC CORPORATION
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.