Granted Patent
Utility
US 5,128,491 · App. 07/738,072
Process for the preparation of glycidyl ethers of di-secondary alcohols with high monomer content
Inventor:
Chi-Wen Cheng
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Jul 30, 1991
Inventor
Chi-Wen Cheng
Assignee (at issue)
Ciba-Geigy
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.