Granted Patent
Utility
US 4,456,773 · App. 06/416,554
Process for the preparation of polyoxyalkylene ethers
Inventor:
Jurgen Fock
Patented Case
View Patent ↗
Granted: Jun 26, 1984
Filed: Sep 10, 1982
Inventor
Jurgen Fock
Assignee (at issue)
Th. Goldschmidt. AG
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.