CPC Definition - Subclass C08B
This place covers:
- Polysaccharides per se or their derivatives, with six or more repeating units, i.e. saccharide radicals attached to each other by glycosidic linkages.
- Processes of extraction, preparation, derivatisation, fractionation, isolation, purification or degradation.
- Covalently or ionically crosslinked gels of polysaccharides.
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds, i.e. addition polymers, are classified in subclass C08F.
Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. condensation polymers, are classified in subclass C08G.
Derivatives of natural macromolecular polymers, e.g. derived from proteins, lignin, ligno-cellulosic materials or vulcanised oils, are classified in subclass C08H.
Working-up, general processes of compounding and after-treatment of macromolecular compounds are classified in subclass C08J, including in particular the making of hydrogels is classified in C08J 3/075.
The use or choice of inorganic or non-macromolecular organic materials as compounding agents are classified in subclass C08K
Polysaccharides or derivatives thereof in solution, or together with other macromolecular compounds, or together with an inorganic or non-macromolecular organic additive are considered as a composition and are thus classified according to the rules of C08L.
Coating compositions based on macromolecular compounds and other polymer compositions for similar uses, e.g. paints, inks, woodstains and printing pastes, are classified in subclass C09D.
Adhesives or binders based on macromolecular compounds, as well as adhesive processes, are classified in subclass C09J.
Multiple Classification
Biocidal, pest repellant, pest attractant, or plant growth regulatory activity of chemical compounds or preparations is further classified in A01P.
Therapeutic activity of chemical compounds or medicinal preparations is further classified in subclass A61P.
Uses of cosmetics or similar toilet preparations are further classified in subclass A61Q.
This place does not cover:
Layered products | |
Mono-, di- or oligosaccharides with five or less saccharide radicals | |
Grafted polysaccharides obtained by reaction of an unsaturated monomer onto a polysaccharide | |
Grafted polysaccharides obtained by reaction of an unsaturated monomer onto a cellulose or derivative thereof | |
Grafted or block polysaccharides obtained by reaction of a polymer with a polysaccharide | |
Fermentation or enzyme-using processes to synthesize polysaccharides | |
Production of cellulose |
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:
Application of polysaccharide compositions as pesticides, biocides, disinfectants and herbicides | |
Treatment or baking of flour or dough | |
Animal feeding-stuffs | |
Foodstuffs or non-alcoholic beverages | |
Use of polysaccharides in preparations for dentistry, e.g. artificial teeth | |
Application of polysaccharide compositions or derivatives thereof in cosmetics or other toilet preparations | |
Use of polysaccharides in medicinal preparations characterised by special physical form, e.g. tablets, coated or not, or size | |
Medicinal preparations containing polysaccharides as active ingredient | |
Medicinal preparations containing material from algae, lichens, fungi or plants | |
Vaccines containing polysaccharides | |
Use of polysaccharides in medicinal preparations characterised by the non-active ingredients | |
Medicinal preparations characterised by the non-active ingredient being chemically bound to the active ingredient, e.g. conjugates | |
Application of polysaccharide compositions in pyrotechnic and as explosive compositions | |
Application of polysaccharide compositions in coating compositions | |
Application of polysaccharide compositions in adhesive compositions | |
Application of polysaccharide compositions for drilling of boreholes or wells | |
Detergents containing polysaccharide compositions | |
Sugar industry |
Attention is drawn to the following places, which may be of interest for search:
Bandages and dressings | |
Use of polysaccharides for bandages, dressings or absorbent pads, e.g. diapers | |
Material for surgical sutures | |
Material for prosthesis | |
Chemical apparatus | |
Wood treatment | |
Edible or biodegradable packaging containing polysaccharides | |
Making solutions of polysaccharides | |
Gels of polysaccharides | |
Making powders of or granulating polysaccharides | |
Compounding polysaccharides | |
Crosslinking of polysaccharides | |
Treatment of polysaccharides by wave-energy or radiation | |
Films of polysaccharides | |
Coatings or multilayers of polysaccharides | |
Making porous, cellular or foamed material of polysaccharides | |
Recovery or working-up of waste-material of polysaccharides | |
Manufacture of artificial filaments, threads, fibres | |
Treatment of fibres, threads, yarns, fabrics, feathers (finishing) | |
Optical elements characterised by the material of which they are made, e.g. contact lenses |
- The subject-matter disclosed in both the claims and the examples of a patent document is to be classified.
- In case of doubt, it is recommended to classify as much data as possible.
- Compositions containing a polysaccharide and an inorganic or non-macromolecular organic additive as compounding agent are not classified in C08K contrary to what is indicated in the rules for C08L or C08K, but in the corresponding C08L subclass together with the corresponding Indexing Code(s) in C08K.
Covalently or ionically crosslinked gels containing a polysaccharide are classified in the corresponding C08B as they are considered as polysaccharide derivatives per se.
Ex. Hydrogel of alginate are classified in C08L 5/04, C08J 3/075 and C08J 2305/04 .
In this place, the following terms or expressions are used with the meaning indicated:
Saccharide radical | Saccharide radicals are monosaccharide repeating units. |
Glycosodic linkage | A glycosidic bond is a type of covalent bond that joins a carbohydrate molecule to another group, which may or may not be another carbohydrate. A glycosidic bond is formed between the hemiacetal group of a saccharide (or a molecule derived from a saccharide) and the hydroxyl group of some organic compound. If the group attached to the carbohydrate residue is not another saccharide it is referred to as an aglycone. If it is another saccharide, the resulting units can be termed as being at the reducing end or the terminal end of the structure. The reducing end of the di- or polysaccharide is towards the last anomeric carbon of the structure, and the terminal end is in the opposite direction.One distinguishes between α- and β-glycosidic bonds based on the relative stereochemistry of the anomeric position and the stereocentre furthest from C1 in the saccharide. In D-hexose sugars in their pyranose forms, an α-glycosidic bond is formed in an axial orientation, whereas a β-glycosidic bond will be oriented equatorially. |
This place covers:
The preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. the preparation of cuprammonium cellulose solutions
The preparation of cellulose suitable for esterification or etherification, e.g. preparation of cellulose nitrate
Alkali cellulose and the apparatus therefor
This place covers:
The preparation of cellulose esters of organic acid, e.g. cellulose formate, cellulose acetate, mixed organic cellulose esters.
The catalysts used for the esterification.
The esterification with maintenance of the fibrous structure of the cellulose .
Post-esterification treatments.
This place covers:
The preparation of cellulose esters of inorganic acids, e.g. cellulose nitrate, i.e. nitrocellulose.
Post-esterification treatments.
This place covers:
Cellulose xanthate.
Viscose.
Their process of preparation.
In this place, the following terms or expressions are used with the meaning indicated:
Viscose | A solution of cellulose xanthate made by treating a cellulose compound with sodium hydroxide and carbon disulfide |
This place covers:
The preparation of cellulose ethers, e.g. alkyl or cycloalkyl ethers, aryl or aralkyl ethers or mixed ethers.
Post-etherification treatments of chemical or physical type, e.g. purification or isolation.
This place covers:
e.g. preparation of cellulose ether xanthates.
The preparation of cellulose derivatives comprising simultaneously ether and ester substituents
This place covers:
Preparation of oxy-cellulose, hydrocellulose, cellulosehydrate or carboxycellulose.
Crosslinking of cellulose or cellulose derivatives.
This place covers:
Methods for regenerating cellulose, e.g. from solution.
Regenerated cellulose as such.
This place covers:
Apparatus and equipment for the preparation of cellulose ethers or cellulose esters, e.g. reactors, mixing devices, tubing, feeders, etc.
This place covers:
The extraction or purification of starch, amylose and amylopectin from raw materials.
The working-up of residues of starch extraction.
The degradation of starch and its products (e.g. dextrin, cold water dispersible starch).
The modification of starch by non-chemical means (ie, mechanical, enzymatic, by irradiation)
This place covers:
The preparation of starch ethers, starch esters, ether-ester.
The crosslinking of starch and starch derivatives.
Oxidation of starch and oxidised starch.
This place covers:
The preparation of amylose ethers, amylose esters, ether-ester.
Oxidised amylose.
This place covers:
The preparation of amylopectin ethers, amylopectin esters, ether-ester.
Oxidised amylopectin.
This place covers:
Extraction, preparation, derivatisation or degradation of polysaccharides per se, including homopolysaccharides (C08B 37/0006) and heteropolysaccharides (C08B 37/006), possibly combined with the extraction / fractionation / isolation / purification of said polysaccharides (C08B 37/0003).
Multiple classification
Polyrotaxanes, e.g. inclusion compounds are classified in C08G 83/007.
Medicinal preparations characterised by the non-active ingredient, e.g. inclusion compounds with cyclodextrins are classified in A61K 47/6951.