CPC Definition - Subclass A62D

Last Updated Version: 2021.05
CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
Definition statement

This place covers:

Compositions:

  • for fire-extinguishing;
  • of materials for coverings or clothing affording protection against harmful
  • chemical agents;
  • of materials for transparent parts of gas-masks, respirators, breathing bags or
  • helmets;
  • of chemical substances for use in breathing apparatus.

Use of chemical substances in extinguishing fires.

Processes chemical, bio-chemical or physico-chemical for chemically altering harmful chemical substances into safe or less dangerous substances.

Fire-extinguishing compositions; Use of chemical substances in extinguishing fires (fireproof paints C09D 5/18; fireproofing materials C09K 21/00)
Definition statement

This place covers:

Compositions for fire-extinguishing

Use of chemical substances in extinguishing fires

References
Limiting references

This place does not cover:

Fire prevention, fire containment or fire fighting, e.g. portable extinguishers or fire-fighting vehicles

A62C

Informative references

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

Fireproof paints

C09D 5/18

Fireproofing materials

C09K 21/00

Processes for making harmful chemical substances harmless or less harmful, by effecting a chemical change in the substances (consuming noxious gases by combustion F23G 7/06)
Definition statement

This place covers:

Processes for chemically altering harmful chemical substances into safe or less-dangerous substances.

These processes can be chemical, bio-chemical or physico-chemical processes, e.g. use of special chemical reagents for chemical fixing, which result in the decomposition or transformation of the harmful chemical substances into harmless or less harmful substances because of a change in their chemical structure.

These processes can comprise the step of dissolving or dispersing the harmful chemical substances in water for the purpose of treating them, or the step of producing, for treatment, a gaseous product from a non-gaseous harmful chemical substance.

The harmful chemical substance can be one component of a mixture, e.g. a component in contaminated sludge.

Relationships with other classification places

The disposal of solid waste or the reclamation of contaminated soil is classified elsewhere, i.e. in class B09.

However, the treatment of a specific harmful chemical substance in solid waste resulting in the change of its chemical constitution to make it harmless or less harmful is covered by A62D 3/00.

In the same way, treatment of sludge is not classified here with the exception of the treatment of a specific harmful chemical substance in the sludge, e.g. in residues from industrial processes (excluding contaminants from municipal sewage treatment) resulting in the change of its chemical constitution to make it harmless or less harmful.

Preventive chemical treatments, e.g. to prevent the formation of harmful chemical substances are classified elsewhere, depending on the kind of treatment and/or the context of application.

Chemical or physico-chemical type processes where eradicating or diminishing the dangerousness of harmful chemical substances produces useful products (e.g. cement) are not covered here. These types of processes are covered by the appropriate subclass for making the specific product.

However in situations where processes for making products include a subset of process steps with eradicating or diminishing the dangerousness of a harmful chemical substance as its fundamental goal, and this subset is in itself novel and unobvious, this subset is covered by group A62D 3/00.

References
Limiting references

This place does not cover:

Detoxification of foods or foodstuffs

A23L 5/20

Apparatus for chemical, physical or physico-chemical processes in general

B01

Treatment of gases, e.g.: chemical or biological purification of smoke or fumes, e.g. flue gas

B01D 53/54

Disposal of solid waste

B09B

Reclamation of contaminated soil

B09C

Chemical processes resulting in the production of a useful product, e.g.: using untreated contaminated fly ash as raw material in the manufacture of cement,

C04B 7/26

Purification or modifying the chemical compositions of combustible gases containing carbon monoxide

C10K

Metals obtained from residues or scrap

C22B

Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust gases

F01N 3/00

Consuming noxious gases by combustion

F23G 7/06

Treatment of radioactively-contaminated waste

G21F 9/00

Application-oriented references

Examples of places where the subject matter of this place is covered when specially adapted, used for a particular purpose, or incorporated in a larger system:

Treatment of waste water, sewage or sludge

C02F

Making explosives harmless by detonation

F42D 5/04

Informative references

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

Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses

A61L 2/00

Disinfection or sterilizing methods specially adapted for refuse

A61L 11/00

Waste or refuse as compounding ingredient for glass, cement, mortar, concrete, artificial stone or ceramics

C03C, C04B

Materials for absorbing liquids to remove pollution, e.g. oil,gasoline, fat

C09K 3/32

Destructive distillation of carbonaceous materials

C10B

Destructive hydrogenation of carbonaceous materials

C10G 1/06

Microorganisms, enzymes or compositions thereof

C12N

Consuming waste by combustion

F23G

Removal or treatment of combustion products or combustion residues

F23J

Special rules of classification
  • In this group, at each hierarchical level, in the absence of an indication to the contrary, classification is made in the first appropriate place.
  • Indexing Codes:

(1) When classifying in this group the Indexing Codes of group A62D 2101/00 are to be used for identifying the origin or chemical nature of the harmful chemical substances which are made harmless or less harmful by processes already classified as such in groups A62D 3/02 - A62D 3/40

(2) When indexing a substance in groups A62D 2101/02 - A62D 2101/08, indexing according to its chemical structure is also made in one or more of groups A62D 2101/20 - A62D 2101/40 , if of interest [C0704]

Glossary of terms

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

Catalyst

Substance which either increases or decreases the speed of a chemical reaction, without itself undergoing a permanent chemical change.

Chalcogen

Also known as chalcogenides, specifically O, S, Se, Te.

Harmful

Directly toxic to living organisms, with the exception of toxic to plants only.

Harmful chemical substances

Chemical waste substances which are too hazardous or toxic to be discarded in an ordinary municipal landfill.

Halogens

The elements F, Cl, Br ,I , At.

Physico-chemical

Having at least one chemical step and one physical step.

Sludge

Residue (normally viscous) from an industrial,residential, or agricultural process.

Composition of materials for coverings or clothing affording protection against harmful chemical agents
Definition statement

This place covers:

Materials for coverings or clothing affording protection against harmful chemical agents.

By materials is meant the chemical substances p.ex. active carbon, which are used in the covering or in the clothing, to neutralise/decompose the harmful agent.

References
Informative references

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

Selection of special materials for outwear

A41D 31/00

Protective clothing affording protection against contamination from chemicals, toxic or hostile environments

A62B 17/006

Filtering material for liquid or gaseous fluids

B01D 39/00

Semi-permeable membranes for separation processes

B01D 69/00

Layered products

B32B

Treatment of fibres, threads, yarns, fabrics, feathers, or fibrous goods or fibrous goods made from such materials

D06M

Composition of materials for transparent parts of gas-masks, respirators, breathing bags, or helmets
Relationships with other classification places

The components parts for gas-masks or gas-helmets are classified in A62B 18/08 and the composition of materials for the windows or other transparent parts of gas-masks are classified in A62D 7/00

References
Informative references

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

Layered products

B32B

Composition for glass

C03C

Composition for transparent ceramics

C04B 35/115

Materials for application to surfaces to minimize adherence of ice, mist or water thereto

C09K 3/18

Clear-view sheets which prevent the formation of water drops or ice
References
Informative references

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

Materials for minimising adherence of ice or water to surfaces

C09K 3/18

Composition of chemical substances for use in breathing apparatus
References
Informative references

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

Production of oxygen-generating compounds in general

C01B 13/00

Processes for the production of oxygen from chemicals in general

C25B 1/02