Granted Patent
Utility
US 5,879,946 · App. 08/842,118
Monitoring of chemical additives
Inventors:
Ian Weeks, Sian Aerona Herbert
Patented Case
View Patent ↗
Granted: Mar 9, 1999
Filed: Apr 28, 1997
Inventors
Ian Weeks
Sian Aerona Herbert
Assignee (at issue)
Molecular Light Technology 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.