Granted Patent
Utility
US 5,877,380 · App. 08/958,171
Quench oil viscosity control in pyrolysis fractionator
Inventors:
Brendan Patrick Conroy, Vijender K. Verma
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Oct 27, 1997
Inventors
Brendan Patrick Conroy
Vijender K. Verma
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.