Granted Patent
Utility
US 5,348,568 · App. 08/013,381
Filtering method of flue gas of a boiler and a filter apparatus for hot gas
Inventors:
Noriyuki Oda, Hiroshi Maeno, Katsumi Higashi, Akira Toriyama, Hiromi Shimoda
Patented Case
View Patent ↗
Granted: Sep 20, 1994
Filed: Feb 4, 1993
Inventors
Noriyuki Oda
Hiroshi Maeno
Katsumi Higashi
Akira Toriyama
Hiromi Shimoda
Assignee (at issue)
ASAHI GLASS CO., LTD.
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.