Granted Patent
Utility
US 6,464,770 · App. 09/635,214
Perlite products with controlled particle size distribution
Inventors:
Scott K. Palm, Bo Wang, Christopher Simon Hayward, John Roulston
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Aug 8, 2000
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.