Granted Patent
Utility
US 6,590,050 · App. 10/224,525
Polymeric fluid loss additives and method of use thereof
Inventors:
Keith A. Bair, Fu Chen, Mohand Melbouci, Teng-Shau Young, De-Kai Loo
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Aug 20, 2002
Inventors
Keith A. Bair
Fu Chen
Mohand Melbouci
Teng-Shau Young
De-Kai Loo
Assignee (at issue)
HERCULES LLC
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.