Granted Patent
Utility
US 4,215,535 · App. 05/870,788
Method and apparatus for reducing nitrous oxide emissions from combustors
Inventor:
George D. Lewis
Patented Case
View Patent ↗
Granted: Aug 5, 1980
Filed: Jan 19, 1978
Inventor
George D. Lewis
Assignee (at issue)
UNITED TECHNOLOGIES CORPORATION
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.