Granted Patent
Utility
US 5,876,897 · App. 08/812,542
Positive photoresists containing novel photoactive compounds
Inventors:
Dana L. Durham, Ping-Hung Lu, Joseph E. Oberlander, Dinesh N. Khanna
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Mar 7, 1997
Inventors
Dana L. Durham
Ping-Hung Lu
Joseph E. Oberlander
Dinesh N. Khanna
Assignee (at issue)
Clariant Finance (BVI) Limited
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.