Granted Patent
Utility
US 6,212,937 · App. 09/237,788
Stack gas emissions monitoring system
Inventors:
David J. Hubert, Brian Gardner, Brian C. Pape
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Jan 26, 1999
Inventors
David J. Hubert
Brian Gardner
Brian C. Pape
Assignee (at issue)
Consumers Energy Company
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.