Class 71/46 - Alkali metal values

Subclass of Class 71 - Chemistry: fertilizers
Definition: Processes wherein Si values are not present.
No. of patents: 3
Last issue date: 12/20/1994

Number	Title	Issue Date
5374294	Controlled release potassium divalent metal phosphate fertilizer A controlled slow release potassium divalent metal phosphate composition for agriculture and an effective method of preparing the composition. The cold water insolubilities of each of the contained nutrients are between 35 and 98 percent. The potassium ex...	12/20/1994
5037470	Nutritive glasses for agriculture A vitreous product which can be used in agriculture is disclosed. With the exception of nitrogen, this vitreous product contains all the major and minor mineral elements which are essential for the nutrition of plants. The vitreous products can contain the fol...	08/06/1991
4202683	Fertilizer Langbeinite (2MgSO4,K2 SO4) is reacted with diammonium phosphate (NH4)2 HPO4 to yield a dry farm field fertilizer of grade 21-12-7+1.22 Mg. The chemical process is also adjusted for a dry farm f...	05/13/1980

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