Granted Patent
Utility
US 5,188,988 · App. 07/618,150
Passivation oxide conversion wherein an anodically grown oxide is converted to the sulfide
Inventors:
Towfik H. Teherani, D. Dawn Little
Patented Case
View Patent ↗
Granted: Feb 23, 1993
Filed: Nov 26, 1990
Inventors
Towfik H. Teherani
D. Dawn Little
Assignee (at issue)
Texas Instruments Incorporated
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.