Granted Patent
Utility
US 5,221,445 · App. 07/339,458
Method for determining identification and concentration of an atmospheric component
Inventors:
Da Yu Wang, Daniel T. Kennedy, Burton W. MacAllister, Jr.
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Apr 17, 1989
Inventors
Da Yu Wang
Daniel T. Kennedy
Burton W. MacAllister, Jr.
Assignee (at issue)
GTE Laboratories Incorporated
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.