Granted Patent
Utility
US 6,514,564 · App. 09/799,644
Dynamic blending gas delivery system and method
Inventors:
Alexandre de Almeida Botelho, Thomas A. Del Prato, Robert William Ford
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Mar 6, 2001
Inventors
Alexandre de Almeida Botelho
Thomas A. Del Prato
Robert William Ford
Assignee (at issue)
Air Products and Chemicals, 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.