Granted Patent
Utility
US 6,616,434 · App. 09/636,349
Blowing agent metering system
Inventors:
Theodore A. Burnham, Jeffrey Ng
Patented Case
View Patent ↗
Granted: Sep 9, 2003
Filed: Aug 10, 2000
Inventors
Theodore A. Burnham
Jeffrey Ng
Assignee (at issue)
Trexel, Inc.
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.