Granted Patent
Utility
US 6,423,534 · App. 09/403,489
Method for eliminating ethanol in exhaust gas
Inventors:
Hirotaka Shiba, Chieko Tada, Takeshi Saeki, Nobuya Matsumoto
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: Oct 22, 1999
Inventors
Hirotaka Shiba
Chieko Tada
Takeshi Saeki
Nobuya Matsumoto
Assignee (at issue)
SUNTORY HOLDINGS 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.