Granted Patent
Utility
US 5,830,441 · App. 08/009,173
Photostable UV absorbent containing A-cyano cinnamyl moiety
Inventors:
Chenjie Wang, Ratan K. Chaudhuri, Janusz Jachowicz, Bruce C. Locke, Frank M. Miksza
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Jan 20, 1998
Inventors
Chenjie Wang
Ratan K. Chaudhuri
Janusz Jachowicz
Bruce C. Locke
Frank M. Miksza
Assignee (at issue)
ISP INVESTMENTS 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.