Granted Patent
Utility
US 5,744,009 · App. 08/499,510
Method and apparatus for recovering condensables in vapor from a urea vacuum evaporator
Inventors:
Vishnu D. Singh, Richard Strait, Thomas Czuppon
Patented Case
View Patent ↗
Granted: Apr 28, 1998
Filed: Jul 7, 1995
Inventors
Vishnu D. Singh
Richard Strait
Thomas Czuppon
Assignee (at issue)
The M.W. Kellogg Company
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.