Granted Patent
Utility
US 4,806,458 · App. 07/064,969
Composition containing a mixture of hexa-alkyl disilazane and propylene glycol alkyl ether and/or propylene glycol alkyl ether acetate
Inventor:
Dana L. Durham
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Aug 27, 1987
Inventor
Dana L. Durham
Assignee (at issue)
Hoechst Celanese 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.