Granted Patent
Utility
US 6,051,627 · App. 09/077,866
Phosphate esters of polyalkylene ether block copolymers and their use as dispersants
Inventors:
Dean Thetford, Mark Holbrook
Patented Case
View Patent ↗
Granted: Apr 18, 2000
Filed: Jun 1, 1998
Inventors
Dean Thetford
Mark Holbrook
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.