Granted Patent
Utility
US 5,851,261 · App. 08/777,426
Process for the production of polyurea encapsulated fertilizer particles and the encapsulated fertilizer particles produced by this process
Inventors:
Peter H. Markusch, Robert L. Cline
Patented Case
View Patent ↗
Granted: Dec 22, 1998
Filed: Dec 30, 1996
Inventors
Peter H. Markusch
Robert L. Cline
Assignee (at issue)
Bayer Aktiengesellschaft
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.