Granted Patent
Utility
US 5,645,624 · App. 08/347,449
Granular fertilizer with a multilayer coating
Inventors:
Hiroshi Naka, Shunsuke Takase
Patented Case
View Patent ↗
Granted: Jul 8, 1997
Filed: Nov 29, 1994
Inventors
Hiroshi Naka
Shunsuke Takase
Assignee (at issue)
ASAHI KASEI KOGYO CO., LTD.
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.