Cooperative Patent Classification


CPC Definition - Subclass C05D

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Last Updated Version: 2017.08
INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
Definition statement

This place covers:

Fertiliser compositions containing potassium, calcium, magnesium and others, including trace elements for plants, processes and apparatus for obtaining them.

Relationships with other classification places

Treating manure; apparatus for distributing fertiliser A01C.

Soil-cultivation substrates A01G 9/00.

Plant growth regulators A01N.

Soil-conditioning or soil-stabilising materials C09K 17/00.

Any apparatus for preparing fertilisers may be classified in those areas of C05 that are specific for such apparatus – e.g., C05B 1/10 – apparatus for the manufacture of superphosphates. Otherwise, individual apparatus should be classified in the relevant area of the IPC, e.g., F26B 7/00

While the subject matter of C05D deals with inorganic fertilisers not covered by subclasses C05B and C05C per se, A01C 3/00 deals with methods of treating manure/methods of manuring per se and A01C 21/00 deals with methods of fertilising per se.

References
Limiting references

This place does not cover:

Nitrogenous fertilisers

Organic fertilisers not covered by subclasses C05B, C05C, e.g. fertilisers from waste or refuse

Informative references

Attention is drawn to the following places, which may be of interest for search:

Harrows with means for distributing fertilisers

Fertlisers distributors

Mowers combined with dispensing apparatus, e.g. for fertilisers

Horticulture; cultivation of vegetables, flowers, rice, fruit, vines, hops or seaweed; forestry; watering

Root feeders; injecting fertilisers into roots

Processes or devices for granultaing materials, in general

Potassium containing inorganic compounds

Magnesium containing inorganic compounds

Calcium containing inorganic compounds

Lime, magnesia or dolomite and aspects of processing

Treatment of molten slag

Special rules of classification

An ingredient in a mixture of fertilisers, or a single fertiliser which contains more that one of the chemical elements on which the subdivision is based, is classified only in the first of the appropriate places. Thus, a nitrophosphate or an ammoniated superphosphate is classified in C05B but not in C05C, magnesium phosphate is classified in C05B but not in C05D, and calcium cyanamide in C05C but not in C05D.

Information relative to the form in which the fertilizer is presented, e.g. granulation, coating, etc. is always given in addition to the chemical composition of the fertilizers.

Any ingredient in a mixture, which is considered to present information of interest for search, is also classified using a combination of classification symbols. If a document concerns embodiments comprising mixtures whose elements are covered individually by different subclasses, groups or subgroups, the document is classified with a combination set.

The following rules apply:

  • The first element of the combination set corresponds to the first relevant (sub)group mentioned in the classification scheme independently of the importance or relevance of the element in the whole fertilizer mixture;
  • the following element or elements of the combination set are added sequentially in the order in which they appear in the classification scheme to the first element using a ",".

Example: a fertilizer containing a mixture of superphosphate (C05B 1/02), ammonium nitrate (C05C 1/00) and potassium chloride (C05D 1/02) will be given the combination set C05B 1/02, C05C 1/00, C05D 1/02.

Example: a fertilizer containing a mixture of either superphosphate (C05B 1/02) or ammonium nitrate (C05C 1/00) with potassium chloride (C05D 1/02) will be given the combination set C05B 1/02, C05D 1/02 and C05C 1/00, C05D 1/02.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Fertiliser (fertiliser material)

Natural or artificial substance containing the chemical elements that improve growth and productiveness of plants.

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "fertiliser" and "plant nutrient "
  • “Amendment”, “Plant food”, “Agricultural chemical” and "Fertiliser"

In patent documents, the following words/expressions are often used with the meaning indicated:

"enrichment"

"fertiliser"

"soil amendment"

" composition capable of modifying the chemical (pH) or physical (structure) condition of soils for agricultural purposes".

Fertilisers containing potassium (C05D 7/00 takes precedence)
Relationships with other classification places

Inorganic compounds of potassium

References
Limiting references

This place does not cover:

Fertilisers producing carbon dioxide

Special rules of classification

This group contains potassium containing fertilizer compounds which do not fall neither under the definition of the former subclasses C05B, C05C nor under the definition of the subgroups C05D 1/005, C05D 1/02, C05D 1/04.

Examples of these compounds are generic references to potassium cations, potassium oxide, potassium hydroxide etc.

Documents classified in C05D 1/005 should also have an additional code of the pertinent group(s) corresponding to the specific post treatment involved.

Calcareous fertilisers (C05D 7/00 takes precedence)
References
Limiting references

This place does not cover:

Fertilisers producing carbon dioxide

Calcium phosphates

from blast-furnace slag or other slags containing lime or calcium silicates
References
Limiting references

This place does not cover:

Thomas phosphate

Fertilisers containing magnesium (C05D 7/00 takes precedence)
References
Limiting references

This place does not cover:

Fertilisers producing carbon dioxide

Fertilisers based in magnesium phosphate

Other inorganic fertilisers
Definition statement

This place covers:

All remaining inorganic fertilisers for which no relevant classification entry exists in the preceding groups. Some examples of fertilizers to be classified here are compounds of sodium, sulphur, chloride, silica per se or in the form of bentonite or diatomaceous earth, silicates, fullers' earth and materials such as ashes, chars, clays (vermiculite, kaolin, etc.) or zeolites, etc. with the proviso that these compounds could not be classified in a previous specific class.

Special rules of classification

Mixtures of these fertilizers with other fertilizers belonging individually to other groups of the classification will be given a Combination Class as explained under the corresponding passage for the class C05.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Fuller's earth

The term is used here in reference to claylike earthy materials which main use is to decolorize, filter or purify oils and fats. This term refers sometimes also to bentonite.

containing trace elements
Definition statement

This place covers:

Fertilizers containing compounds of elements which as trace element are essential or beneficial for plants.

The following elements are classified here: iron, manganese, boron, zinc, molybdenum, nickel, cobalt or copper.

The elements chromium, selenium, iodine and silicon are also classified under this entry if the purpose of the fertilization is to provide trace elements to plants. Eventually, other elements serving this purpose would be classified here.

Special rules of classification

Mixtures of these fertilizers with other fertilizers belonging individually to other groups of the classification will be given a Combination Class as explained under the corresponding passage for the class C05.

Glossary of terms

In this place, the following terms or expressions are used with the meaning indicated:

Trace element; microelement; oligoelement

Elements essential or beneficial for plant life in very small (trace) quantities; for classification purposes these elements are: Fe, Mn, Zn, Cu, Ni Cl, B, Mo, Si, Se

Synonyms and Keywords

In patent documents, the following words/expressions are often used as synonyms:

  • "trace element" , "microelement" and "oligoelement"