Granted Patent
Utility
US 5,399,747 · App. 08/187,027
Process for preparing carboxylic acids by carbonylation of ethers and thioethers
Inventors:
Kannappan Chockalingam, Tse-Chong Wu
Patented Case
View Patent ↗
Granted: Mar 21, 1995
Filed: Jan 27, 1994
Inventors
Kannappan Chockalingam
Tse-Chong Wu
Assignee (at issue)
ALBEMARLE 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.