Granted Patent
Utility
US 5,993,505 · App. 09/083,734
Controlled release fertilizer compositions and processes for the preparation thereof
Inventors:
Edze Jan Tijsma, Johannes Gijsbertus Antonius Terlingen, Seija Helena Aalto, Hendrikus Gijsbertus Adrianus van Kaathoven
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: May 22, 1998
Inventors
Edze Jan Tijsma
Johannes Gijsbertus Antonius Terlingen
Seija Helena Aalto
Hendrikus Gijsbertus Adrianus van Kaathoven
Assignee (at issue)
OMS Investments, 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.