Granted Patent
Utility
US 5,985,940 · App. 09/025,714
Method of mitigating fouling and reducing viscosity in primary fractionators and quench sections of ethylene plants
Inventors:
Maria B. Manek, Chin Hai Chen, Roberto G. Presenti, Hernando Diaz-Arauzo
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Feb 17, 1998
Inventors
Maria B. Manek
Chin Hai Chen
Roberto G. Presenti
Hernando Diaz-Arauzo
Assignee (at issue)
Nalco/Exxon Energy Chemicals, L.P.
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.