Granted Patent
Utility
US 4,867,918 · App. 07/139,573
Gas dispersion process and system
Inventors:
Kazuo Kiyonaga, Lawrence M. Litz, Thomas John Bergman, Jr.
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Dec 30, 1987
Inventors
Kazuo Kiyonaga
Lawrence M. Litz
Thomas John Bergman, Jr.
Assignee (at issue)
Union Carbide 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.