Granted Patent
Utility
US 5,670,037 · App. 08/232,605
Process for producing light olefins by catalytic conversion of hydrocarbons
Inventors:
Li Zaiting, Xie Chaogang, Shi Wenyuan, Jiang Fukang, Liu Shunhua, Pan Rennan, Li Shichun
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Apr 25, 1994
Inventors
Li Zaiting
Xie Chaogang
Shi Wenyuan
Jiang Fukang
Liu Shunhua
Pan Rennan
Li Shichun
Assignees (at issue)
CHINA PETROCHEMICAL CORPORATION
RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
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.