Granted Patent
Utility
US 6,388,154 · App. 09/462,482
Process for producing styrene
Inventors:
Ryozo Hamana, Shohei Suzuki, Syuji Obayashi, Makoto Takiguchi, Hisashi Fujita
Patented Case
View Patent ↗
Granted: May 14, 2002
Filed: Jan 18, 2000
Inventors
Ryozo Hamana
Shohei Suzuki
Syuji Obayashi
Makoto Takiguchi
Hisashi Fujita
Assignee (at issue)
MITSUBISHI CHEMICAL 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.