Granted Patent
Utility
US 4,608,401 · App. 06/758,850
Method of encapsulating finely divided solid particles
Inventor:
Robert W. Martin
Patented Case
View Patent ↗
Granted: Aug 26, 1986
Filed: Jul 26, 1985
Inventor
Robert W. Martin
Assignee (at issue)
Union Carbide 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.