Granted Patent
Utility
US 6,327,872 · App. 09/604,947
Method and apparatus for producing a pressurized high purity liquid carbon dioxide stream
Inventors:
Robert W. Boyd, Jessi Lynn Pike, David C. H. Cheng, Kelly Leitch
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Jun 27, 2000
Inventors
Robert W. Boyd
Jessi Lynn Pike
David C. H. Cheng
Kelly Leitch
Assignee (at issue)
The BOC Group Limited
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.