Granted Patent
Utility
US 5,645,840 · App. 08/543,856
Ultrafine sodium bicarbonate powder
Inventors:
M. Stephen Lajoie, Anthony E. Winston
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Oct 12, 1995
Inventors
M. Stephen Lajoie
Anthony E. Winston
Assignee (at issue)
Church & Dwight Co., Inc.
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.