Granted Patent
Utility
US 5,900,146 · App. 08/809,043
Polymer beads and method for preparation thereof
Inventors:
Mathew John Ballard, Robert James Eldridge, James Bates
Patented Case
View Patent ↗
Granted: May 4, 1999
Filed: May 21, 1997
Inventors
Mathew John Ballard
Robert James Eldridge
James Bates
Assignee (at issue)
ICI Australia Operations Proprietary 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.