Granted Patent
Utility
US 4,806,360 · App. 07/112,971
Synthetic melanin aggregates
Inventors:
Helen Leong, Martin Katz, Anne Delk, David L. Berliner, Sergio Nacht
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Oct 23, 1987
Inventors
Helen Leong
Martin Katz
Anne Delk
David L. Berliner
Sergio Nacht
Assignee (at issue)
Advanced Poymer Systems, Inc.
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.