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CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
Definition statement
This subclass/group 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 subclass/group covers:

Compositions for fire-extinguishing

Use of chemical substances in extinguishing fires

References relevant to classification in this group
This subclass/group does not cover:
Fire prevention, fire containment or fire fighting, e.g. portable extinguishers or fire-fighting vehicles
Informative references
Attention is drawn to the following places, which may be of interest for search:
Fireproof paints
Fireproofing materials C09K 21/00
Special rules of classification within this group

The following IPC groups are not used in the internal ECLA classification scheme. Subject matter covered by these groups is classified in the following ECLA groups:

A62D1/02 covered by A62D 1/0007, A62D 1/0071

A62D1/04 covered by A62D 1/0071

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 subclass/group 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.

Relationship between large subject matter areas
  • 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.
  • When enzymes or microorganisms are used within processes fully provided for in subclass A62D in order to liberate, separate or purify a pre-existing compound or composition or to treat or clean textiles or solid material surfaces, they should also be classified in subclass C12S based upon its Note (1) to provide a complete search.
References relevant to classification in this group
This subclass/group does not cover:
Detoxification of foods or foodstuffs
Apparatus for chemical, physical or physico-chemical processes in general
Treatment of gases, e.g.: chemical or biological purification of smoke or fumes, e.g. flue gas
Disposal of solid waste
Reclamation of contaminated soil
Purification or modifying the chemical compositions of combustible gases containing carbon monoxide
Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust gases
Consuming noxious gases by combustion
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,
Metals obtained from residues or scrap
Treatment of radioactively-contaminated waste

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

Treatment of waste water, sewage or sludge
Making explosives harmless by detonation
Informative references
Attention is drawn to the following places, which may be of interest for search:
Disinfection or sterilizing methods specially adapted for refuse
Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses
Waste or refuse as compounding ingredient for glass, cement, mortar, concrete, artificial stone or ceramics
Materials for absorbing liquids to remove pollution, e.g. oil,gasoline, fat
Destructive distillation of carbonaceous materials
Destructive hydrogenation of carbonaceous materials
Micro-organisms, enzymes or compositions thereof
Consuming waste by combustion
Removal or treatment of combustion products or combustion residues
Special rules of classification within this group

- 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 to A63D3/40

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

Glossary of terms
In this subclass/group, 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 subclass/group 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.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Protective clothing affording protection against contamination from chemicals, toxic or hostile environments
Filtering material for liquid or gaseous fluids
Semi-permeable membranes for separation processes
Layered products
Selection of special materials for outwear
Treatment of fibres, threads, yarns, fabrics, feathers, or fibrous goods or fibrous goods made from such materials
Composition of materials for transparent parts of gas-masks, respirators, breathing bags, or helmets
Relationship between large subject matter areas

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

Informative references
Attention is drawn to the following places, which may be of interest for search:
Composition for glass
Composition for transparent ceramics
Materials for application to surfaces to minimize adherence of ice, mist or water thereto
Layered products
Clear-view sheets which prevent the formation of water drops or ice (materials for minimising adherence of ice or water to surfaces C09K 3/18)
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
Composition of chemical substances for use in breathing apparatus (production of oxygen-generating compounds in general, processes for the production of oxygen from chemicals in general C01B 13/00, C25B 1/02)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Production of oxygen-generating compounds in general
Processes for the production of oxygen from chemicals in general
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Last Modified: 10/11/2013