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Class Information
Number:
71/38
Name:
Chemistry: fertilizers
>
Processes and products
>
Inorganic material
>
Phosphorus-containing
>
Phosphates
>
Acid treatment
> Gaseous
Description:
Processes wherein the acid is supplied in the gaseous state.
Patents under this class:
Patent Number
Title Of Patent
Date Issued
7497891
Method for producing a fertilizer with micronutrients
Mar. 3, 2009
6391080
Phosphate, phosphatic fertilizers manufacturing process
May. 21, 2002
T962001
Preparation of dicalcium phosphate from phosphate rock by the use of sulfur dioxide, water, and carbonyl compounds
Sep. 6, 1977
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