Granted Patent
Utility
US 4,663,286 · App. 06/579,494
Encapsulation of materials
Inventors:
Wen-Ghih Tsang, Ann W. Shyr
Patented Case
View Patent ↗
Granted: May 5, 1987
Filed: Feb 13, 1984
Inventors
Wen-Ghih Tsang
Ann W. Shyr
Assignee (at issue)
Damon Biotech, 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.