Granted Patent
Utility
US 6,340,559 · App. 09/789,654
Semiconductor developing agent
Inventors:
Wei-Yang Su, Stephen Lee Sjoberg, Wheeler C. Crawford
Patented Case
View Patent ↗
Granted: Jan 22, 2002
Filed: Feb 21, 2001
Inventors
Wei-Yang Su
Stephen Lee Sjoberg
Wheeler C. Crawford
Assignee (at issue)
HUNTSMAN PETROCHEMICAL LLC
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.