Granted Patent
Utility
US 6,190,858 · App. 09/331,749
Detection of conditions by analysis of gases or vapors
Inventors:
Krishna Chandra Persaud, Allan John Syms
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Aug 23, 1999
Inventors
Krishna Chandra Persaud
Allan John Syms
Assignee (at issue)
Osmetech PLC
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.