Granted Patent
Utility
US 5,338,824 · App. 08/087,646
Removal of alkali metal methoxide catalyst residue from hydroxy-terminated conjugated diene polymers
Inventors:
Zaida Diaz, Raymond C. Tsiang
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Jul 6, 1993
Inventors
Zaida Diaz
Raymond C. Tsiang
Assignee (at issue)
SHELL OIL 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.