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PHOSPHATIC FERTILISERS
Definition statement
This subclass covers:

Fertilizer compositions containing phosphorus in any organic or inorganic form, processes and apparatus for obtaining them.

Relationship between large subject matter areas

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.

References relevant to classification in this subclass
This subclass does not cover:

Nitrogenous fertilisers

Inorganic fertilisers not covered by subclasses C05B, C05C; fertilisers producing carbon dioxide

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

Phosphorus; compounds thereof

Special rules of classification within this subclass

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 subclass, 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 expressions "fertiliser" and "plant nutrient " are often used as synonyms.

In patent documents the following expressions/words “Amendment”, “Plant food”, “Agricultural chemical” and "Fertiliser" are often used as synonyms.

In patent documents the expression/word "enrichment" is often used with the meaning "fertiliser"

The expression "soil amendment" is often used with the meaning " composition capable of modifying the chemical (pH) or physical (structure) condition of soils for agricultural purposes".

Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
Definition statement
This group covers:

Fertilisers produced by reacting rock or bone phosphates with sulphuric or phosphoric acid in such amounts and concentrations as to yield solid products directly and apparatus for their manufacture.

References relevant to classification in this group
This group does not cover:

Fertilizers based essentially on ammonium orthophosphate

Fertilisers based essentially on di-calcium phosphate (C05B 11/00 takes precedence)
References relevant to classification in this group
This group does not cover:

Di calcium phosphate fertilisers produced by wet treating raw materials with acids or alkalis

Thomas phosphate; Other slag phosphates
Definition statement
This group covers:

Fertilizers obtained from phosphate containing slags, waste or by products of metallurgical processes with fertilizer value.

Glossary of terms
In this group, the following terms (or expressions) are used with the meaning indicated:

Thomas phosphate; Thomas slag

slag calcium phosphate obtained in steelmaking converters from pig iron with high phosphorus acid content

Synonyms and Keywords

In patent documents the following expressions "Thomas phosphate", "Thomas slag" and "converter slag" are often used as synonyms.

Fertilisers based essentially on alkali or ammonium orthophosphates (C05B 11/00 takes precedence)
References relevant to classification in this group
This group does not cover:

Alkali or ammonium orthophosphates produced by wet or leach treatment with acids or alkalis

Fertilisers based essentially on phosphates or double phosphates of magnesium (C05B 11/00 takes precedence)
References relevant to classification in this group
This group does not cover:

Fertilisers based essentially on phosphates or double phosphates of magnesium produced by wet or leach treatment with acids or alkalis

Fertilisers produced by pyrogenic processes from phosphatic materials
Definition statement
This group covers:

Fertilisers produced by pyrogenic processes from phosphatic materials like rock phosphates or metallic phosphorus compounds such as to rend polyphosphate fertilisers.

This group mainly contains polyphosphates, and also any other fertilizers produced from pyrogenic processes from phosphate fertilizers

Organic phosphatic fertilisers (bone meal C05B 17/00)
Definition statement
This group covers:

Phosphatic fertilisers of organic nature.

References relevant to classification in this group
This group does not cover:

Bone meal

Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
Definition statement
This group covers:

Other phosphatic fertilisers not classified in the previous groups, e.g. soft rock phosphates, bone meal, phosphite fertilisers.

Granulation or pelletisation of phosphatic fertilisers, other than slag (granulating apparatus B01J 2/00; granulating slag C04B)
Definition statement
This group covers:

Exclusively granulation or pelletisation of fertilizers belonging to any of the groups C05B.

References relevant to classification in this group
This group does not cover:

Granulating slag

Granulating apparatus

Process in general for granulating fertilizers

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Last Modified: 10/11/2013