Granted Patent
Utility
US 5,298,502 · App. 07/814,305
Method and composition for photodynamic treatment and detection of tumors
Inventors:
Blaik P. Halling, Debra A. Witkowski
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Dec 23, 1991
Inventors
Blaik P. Halling
Debra A. Witkowski
Assignee (at issue)
FMC 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.