Granted Patent
Utility
US 4,576,834 · App. 06/735,515
Method for forming trench isolation structures
Inventor:
Zbigniew P. Sobczak
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: May 20, 1985
Inventor
Zbigniew P. Sobczak
Assignee (at issue)
NCR 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.