Granted Patent
Utility
US 6,306,317 · App. 09/577,743
Phosphate free fire retardant composition
Inventors:
Michael Richards, Douglas J. Herdman
Patented Case
View Patent ↗
Granted: Oct 23, 2001
Filed: May 23, 2000
Inventors
Michael Richards
Douglas J. Herdman
Assignee (at issue)
STN
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.