Granted Patent
Utility
US 5,203,906 · App. 07/797,153
Anti-clumping products, compositions and treatments for salts, simple and complex fertilizers
Inventors:
Joseph Schapira, Jean-Claude Cheminaud, Pascal Petitbon, Daniel Chaillou
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Nov 26, 1991
Inventors
Joseph Schapira
Jean-Claude Cheminaud
Pascal Petitbon
Daniel Chaillou
Assignee (at issue)
Compagnie Francaise de Produits Industriels
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.