Granted Patent
Utility
US 6,171,489 · App. 09/289,057
Polymer beads and method for preparation thereof
Inventors:
Mathew John Ballard, Robert James Eldridge, James Bates
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Apr 12, 1999
Inventors
Mathew John Ballard
Robert James Eldridge
James Bates
Assignees (at issue)
ICI Australia Operations Proprietary Limited
Industrial Research Organisation
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.