Granted Patent
Utility
US 6,069,210 · App. 09/180,196
Phosphate esters of polyoxyalkylene ether block copolymers and their dispersants
Inventors:
David Cartridge, Dean Thetford
Patented Case
View Patent ↗
Granted: May 30, 2000
Filed: Nov 4, 1998
Inventors
David Cartridge
Dean Thetford
Assignee (at issue)
Zeneca Limited
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.