Granted Patent
Utility
US 6,689,903 · App. 10/159,394
Crystallization method for production of purified aromatic dicarboxylic acids
Inventors:
Ruairi Seosamh O'Meadhra, Robert Lin, Shane Kipley Kirk, Brian David McMurray
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: May 30, 2002
Inventors
Ruairi Seosamh O'Meadhra
Robert Lin
Shane Kipley Kirk
Brian David McMurray
Assignee (at issue)
Eastman Chemical Company
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.