Granted Patent
Utility
US 5,464,593 · App. 08/273,874
Process for producing spherical zeolite catalyst and apparatus for producing the same
Inventors:
Kazuo Takahashi, Fumio Kumata, Hitoshi Nozaki, Shinichi Inoue, Toshiji Makabe
Patented Case
View Patent ↗
Granted: Nov 7, 1995
Filed: Jul 12, 1994
Inventors
Kazuo Takahashi
Fumio Kumata
Hitoshi Nozaki
Shinichi Inoue
Toshiji Makabe
Assignees (at issue)
Mitsubishi Oil Co., Ltd.
CHIYODA 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.