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Color Curly Brackets (indicating CPC extensions to IPC) References Date Revised

CPC
COOPERATIVE PATENT CLASSIFICATION
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INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
WARNING
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IPC group C05D11/00 is not used in the CPC scheme. Subject matter covered by this group is classified in one of the CPC groups C05D 1/00 to C05D 9/00 (see internal note after the title of class C05)

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Fertilisers containing potassium (C05D 7/00 takes precedence)
C05D 1/005
.
{
post-treatment
}
C05D 1/02
.
Manufacture from potassium chloride or sulfate or double or mixed salts thereof
C05D 1/04
.
from minerals or volcanic rocks
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Calcareous fertilisers (C05D 7/00 takes precedence)
C05D 3/02
.
from limestone, calcium carbonate, calcium hydrate, slaked lime, calcium oxide, waste calcium products
.
from blast-furnace slag or other slags containing lime or calcium silicates
Fertilisers containing magnesium (C05D 7/00 takes precedence)
C05D 7/00
Fertilisers producing carbon dioxide
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Other inorganic fertilisers
.
containing trace elements
This page is owned by Office of Patent Classification.
Last Modified: 10/10/2013