Granted Patent
Utility
US 5,435,822 · App. 08/198,682
Spray dried water dispersible fertilizer
Inventor:
John J. Blouin
Patented Case
View Patent ↗
Granted: Jul 25, 1995
Filed: Feb 18, 1994
Inventor
John J. Blouin
Assignee (at issue)
W.R. Grace & Co. Conn.
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.