Granted Patent
Utility
US 6,464,757 · App. 09/932,814
Filter for chemical oxygen generators
Inventors:
Yunchang Zhang, Michael J. Brumely, James C. Cannon, John E. Ellison, Girish S. Kshirsagar
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Aug 17, 2001
Inventors
Yunchang Zhang
Michael J. Brumely
James C. Cannon
John E. Ellison
Girish S. Kshirsagar
Assignee (at issue)
BE Intellectual Property, 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.