Granted Patent
Utility
US 6,162,644 · App. 09/268,804
Method for controlling and optimizing xylene isomer separation and isomerization process using near infrared analyzer system and apparatus for carrying out same
Inventors:
Sun Choi, Yong-Sueng Kim, Hoe-Il Chung, Suk Joon Kim, Joon-Sik Lee, Min-Sik Ku, Young Hwan Kim
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Mar 16, 1999
Inventors
Sun Choi
Yong-Sueng Kim
Hoe-Il Chung
Suk Joon Kim
Joon-Sik Lee
Min-Sik Ku
Young Hwan Kim
Assignee (at issue)
SK HOLDINGS 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.