Granted Patent
Utility
US 6,712,898 · App. 10/268,573
Perlite products with controlled particle size distribution
Inventors:
Scott K. Palm, Bo Wang, Christopher Simon Hayward, John Roulston
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Oct 9, 2002
Inventors
Scott K. Palm
Bo Wang
Christopher Simon Hayward
John Roulston
Assignee (at issue)
Advanced Minerals Corporation
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.