Granted Patent
Utility
US 5,232,963 · App. 07/911,231
Dispersing gums in hydrocarbon streams with .beta.-olefin/maleic anhydride copolymer
Inventors:
David G. Comer, Sherri L. Fisher
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Jul 9, 1992
Inventors
David G. Comer
Sherri L. Fisher
Assignee (at issue)
Nalco Chemical 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.