Granted Patent
Utility
US 6,624,298 · App. 10/068,501
Esterified polysaccharide products and &bgr;-lactone ring opened ketene dimer products containing the compositions, and process of making the same
Inventors:
Huai N. Cheng, Qu-Ming Gu
Patented Case
View Patent ↗
Granted: Sep 23, 2003
Filed: Feb 6, 2002
Inventors
Huai N. Cheng
Qu-Ming Gu
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.