Granted Patent
Utility
US 4,803,147 · App. 07/124,742
Photosensitive polyimide polymer compositions
Inventors:
Werner H. Mueller, Dinesh N. Khanna, Rohitkumar H. Vora
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Nov 24, 1987
Inventors
Werner H. Mueller
Dinesh N. Khanna
Rohitkumar H. Vora
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.