1. CPC Sections
  2. CPC Section C
  3. CPC Class C08
  4. CPC Subclass C08B
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CPC
COOPERATIVE PATENT CLASSIFICATION
​
C08B
POLYSACCHARIDES; DERIVATIVES THEREOF (polysaccharides containing less than six saccharide radicals attached to each other by glycosidic linkages C07H; fermentation or enzyme-using processes C12P 19/00; sugar industry C13; production of cellulose D21) [2019-08]
WARNINGS

  • The following IPC groups are not in the CPC scheme. The subject matter for these IPC groups is classified in the following CPC groups:
    C08B37/02 covered by C08B 37/0021
    C08B37/04 covered by C08B 37/0084
    C08B37/06 covered by C08B 37/0045
    C08B37/08 covered by C08B 37/003 (chitin), C08B 37/0072 (hyaluronic acid) and C08B 37/0069 (chondroitin sulfate)
    C08B37/10 covered by C08B 37/0075
    C08B37/16 covered by C08B 37/0012
  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
Preparation [2013-01]
C08B 1/00
Preparatory treatment of cellulose for making derivatives thereof {, e.g. pre-treatment, pre-soaking, activation} [2015-11]
C08B 1/003
.
{Preparation of cellulose solutions, i.e. dopes, with different possible solvents, e.g. ionic liquids (solutions used in the manufacture of monocomponent artificial filaments or cellulose or derivatives thereof D01F 2/02)} [2013-01]
C08B 1/006
.
{Preparation of cuprammonium cellulose solutions} [2013-01]
C08B 1/02
.
Rendering cellulose suitable for esterification {(esterification per se, C08B 3/00, C08B 5/00, C08B 7/00 or C08B 9/00)} [2013-01]
C08B 1/04
. .
for the preparation of cellulose nitrate [2013-01]
C08B 1/06
.
Rendering cellulose suitable for etherification {(etherification per se C08B 11/00)} [2013-01]
C08B 1/08
.
Alkali cellulose [2013-01]
C08B 1/10
. .
Apparatus for the preparation of alkali cellulose [2013-01]
C08B 1/12
. . .
Steeping devices [2013-01]
C08B 1/14
. . .
Ripening devices [2013-01]
C08B 3/00
Preparation of cellulose esters of organic acids {(rendering cellulose suitable for esterification C08B 1/02)} [2013-01]
C08B 3/02
.
Catalysts used for the esterification [2013-01]
C08B 3/04
.
Cellulose formate [2013-01]
C08B 3/06
.
Cellulose acetate {, e.g. mono-acetate, di-acetate or tri-acetate} [2015-11]
C08B 3/08
.
of monobasic organic acids with three or more carbon atoms, {e.g. propionate or butyrate} [2017-08]
C08B 3/10
. .
with five or more carbon-atoms, {e.g. valerate} [2013-01]
C08B 3/12
.
of polybasic organic acids [2013-01]
C08B 3/14
.
in which the organic acid residue contains substituents, e.g. NH2, Cl [2013-01]
C08B 3/16
.
Preparation of mixed organic cellulose esters {, e.g. cellulose aceto-formate or cellulose aceto-propionate} [2017-08]
C08B 3/18
. .
Aceto-butyrates [2013-01]
C08B 3/20
.
Esterification with maintenance of the fibrous structure of the cellulose (surface esterification of textiles D06M 13/00) [2013-01]
C08B 3/22
.
Post-esterification treatments, including purification [2013-01]
C08B 3/24
. .
Hydrolysis or ripening [2013-01]
C08B 3/26
. .
Isolation of the cellulose ester [2013-01]
C08B 3/28
. . .
by precipitation [2013-01]
C08B 3/30
. .
Stabilising (by addition of stabilisers C08K) [2013-01]
C08B 5/00
Preparation of cellulose esters of inorganic acids {, e.g. phosphates (rendering cellulose suitable for esterification C08B 1/02)} [2017-08]
C08B 5/02
.
Cellulose nitrate {, i.e. nitrocellulose (rendering cellulose suitable for the preparation of cellulose nitrate C08B 1/04)} [2017-08]
C08B 5/04
. .
Post-esterification treatments {, e.g. densification of powders}, including purification [2017-08]
C08B 5/06
. . .
Isolation of the cellulose nitrate [2013-01]
C08B 5/08
. . .
Stabilisation (by addition of stabilisers C08K); {Post-treatment, e.g. phlegmatisation} [2013-01]
C08B 5/10
. . .
Reducing the viscosity [2013-01]
C08B 5/12
. . .
Replacing the water by organic liquids [2013-01]
C08B 5/14
.
Cellulose sulfate [2013-01]
C08B 7/00
Preparation of cellulose esters of both organic and inorganic acids {(rendering cellulose suitable for esterification C08B 1/02)} [2013-01]
C08B 9/00
Cellulose xanthate; Viscose {(formation of films C08J 5/18; formation of fibres D01F; rendering cellulose suitable for esterification C08B 1/02)} [2013-01]
C08B 9/02
.
Sulfidisers; Dissolvers [2013-01]
C08B 9/04
.
Continuous processes [2013-01]
C08B 9/06
.
Single-stage processes [2013-01]
C08B 11/00
Preparation of cellulose ethers {(rendering cellulose suitable for etherification C08B 1/06)} [2013-01]
C08B 11/02
.
Alkyl or cycloalkyl ethers [2013-01]
C08B 11/04
. .
with substituted hydrocarbon radicals [2013-01]
C08B 11/06
. . .
with halogen-substituted hydrocarbon radials [2013-01]
C08B 11/08
. . .
with hydroxylated hydrocarbon radicals; Esters, ethers, or acetals thereof [2013-01]
C08B 11/10
. . .
substituted with acid radicals [2013-01]
C08B 11/12
. . . .
substituted with carboxylic radicals {, e.g. carboxymethylcellulose [CMC]} [2017-08]
C08B 11/14
. . .
with nitrogen-containing groups [2013-01]
C08B 11/145
. . . .
with basic nitrogen, e.g. aminoalkyl ethers [2013-01]
C08B 11/15
. . . .
with carbamoyl groups {, i.e. -CO-NH2} [2017-08]
C08B 11/155
. . . .
with cyano groups, e.g. cyanoalkyl ethers [2013-01]
C08B 11/16
.
Aryl or aralkyl ethers [2013-01]
C08B 11/18
. .
with substituted hydrocarbon radicals [2013-01]
C08B 11/187
.
with olefinic unsaturated groups [2013-01]
C08B 11/193
.
Mixed ethers, i.e. ethers with two or more different etherifying groups [2013-01]
C08B 11/20
.
Post-etherification treatments of chemical or physical type, {e.g. mixed etherification in two steps}, including purification [2013-01]
C08B 11/22
. .
Isolation [2013-01]
C08B 13/00
Preparation of cellulose ether-esters [2013-01]
C08B 13/02
.
Cellulose ether xanthates [2013-01]
C08B 15/00
Preparation of other cellulose derivatives or modified cellulose {, e.g. complexes} [2017-08]
C08B 15/005
.
{Crosslinking of cellulose derivatives} [2013-01]
C08B 15/02
.
Oxycellulose; Hydrocellulose; {Cellulosehydrate, e.g. microcrystalline cellulose} [2017-08]
C08B 15/04
. .
Carboxycellulose, e.g. prepared by oxidation with nitrogen dioxide [2013-01]
C08B 15/05
.
Derivatives containing elements other than carbon, hydrogen, oxygen, halogens or sulfur (esters or phosphorous acids C08B 5/00) [2013-01]
C08B 15/06
. .
containing nitrogen {, e.g. carbamates} [2017-08]
C08B 15/08
.
Fractionation of cellulose, e.g. separation of cellulose crystallites [2013-01]
C08B 15/10
.
Crosslinking of cellulose [2013-01]
C08B 16/00
Regeneration of cellulose [2013-01]
C08B 17/00
Apparatus for esterification or etherification of cellulose [2013-01]
C08B 17/02
.
for making organic esters of cellulose [2013-01]
C08B 17/04
.
for making cellulose nitrate [2013-01]
C08B 17/06
.
for making cellulose ethers [2013-01]
C08B 30/00
Preparation of starch, degraded or non-chemically modified starch, amylose, or amylopectin [2013-01]
C08B 30/02
.
Preparatory treatment, e.g. crushing of raw materials {or steeping process (machines for preliminary washing A23N)} [2013-01]
C08B 30/04
.
Extraction or purification [2013-01]
C08B 30/042
. .
{from cereals or grains} [2015-10]
C08B 30/044
. . .
{from corn or maize} [2015-10]
C08B 30/046
. . .
{from wheat} [2015-10]
C08B 30/048
. .
{from potatoes} [2015-10]
C08B 30/06
.
Drying; Forming [2013-01]
C08B 30/08
.
Concentration of starch suspensions [2013-01]
C08B 30/10
.
Working-up residues from the starch extraction {, e.g. potato peel or steeping water}, including pressing water from the starch-extracted material [2017-08]
C08B 30/12
.
Degraded, {destructured} or non-chemically modified starch {, e.g. mechanically, enzymatically or by irradiation; Bleaching of starch (preparation of chemical derivatives of starch C08B 31/00)} [2016-08]
C08B 30/14
. .
Cold water dispersible or pregelatinised starch [2013-01]
C08B 30/16
. .
Apparatus therefor [2013-01]
C08B 30/18
. .
Dextrin {, e.g. yellow canari, white dextrin, amylodextrin or maltodextrin; Methods of depolymerisation, e.g. by irradiation or mechanically} [2017-08]
C08B 30/20
.
Amylose or amylopectin (chemical derivatives thereof C08B 33/00, C08B 35/00) [2013-01]
C08B 31/00
Preparation of derivatives of starch (derivatives of amylose C08B 33/00; derivatives of amylopectin C08B 35/00) [2013-01]
C08B 31/003
.
{Crosslinking of starch} [2013-01]
C08B 31/006
. .
{Crosslinking of derivatives of starch} [2013-01]
C08B 31/02
.
Esters [2013-01]
C08B 31/04
. .
of organic acids {, e.g. alkenyl-succinated starch} [2017-08]
C08B 31/06
. .
of inorganic acids [2013-01]
C08B 31/063
. . .
{Starch sulfates} [2013-01]
C08B 31/066
. . .
{Starch phosphates, e.g. phosphorylated starch} [2013-01]
C08B 31/08
.
Ethers [2013-01]
C08B 31/10
. .
Alkyl or cycloalkyl ethers [2013-01]
C08B 31/12
. .
having alkyl or cycloalkyl radicals substituted by heteroatoms, {e.g. hydroxyalkyl or carboxyalkyl starch} [2013-01]
C08B 31/125
. . .
{having a substituent containing at least one nitrogen atom, e.g. cationic starch} [2017-08]
C08B 31/14
. .
Aryl or aralkyl ethers [2013-01]
C08B 31/16
.
Ether-esters [2013-01]
C08B 31/18
.
Oxidised starch [2013-01]
C08B 31/185
. .
{Derivatives of oxidised starch, e.g. crosslinked oxidised starch} [2013-01]
C08B 33/00
Preparation of derivatives of amylose [2013-01]
C08B 33/02
.
Esters [2013-01]
C08B 33/04
.
Ethers [2013-01]
C08B 33/06
.
Ether-esters [2013-01]
C08B 33/08
.
Oxidised amylose [2013-01]
C08B 35/00
Preparation of derivatives of amylopectin [2013-01]
C08B 35/02
.
Esters [2013-01]
C08B 35/04
.
Ethers [2013-01]
C08B 35/06
.
Ether-esters [2013-01]
C08B 35/08
.
Oxidised amylopectin [2013-01]
C08B 37/00
Preparation of polysaccharides not provided for in groups C08B 1/00 - C08B 35/00; Derivatives thereof (cellulose D21; {microbiological processes C12P}) [2016-05]
C08B 37/0003
.
{General processes for their isolation or fractionation, e.g. purification or extraction from biomass} [2013-01]
C08B 37/0006
.
{Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid} [2013-01]
C08B 37/0009
. .
{alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof} [2013-01]
C08B 37/0012
. . .
{Cyclodextrin [CD], e.g. cycle with 6 units (alpha), with 7 units (beta) and with 8 units (gamma), large-ring cyclodextrin or cycloamylose with 9 units or more; Derivatives thereof} [2013-01]
C08B 37/0015
. . . .
{Inclusion compounds, i.e. host-guest compounds, e.g. polyrotaxanes} [2013-01]
C08B 37/0018
. . .
{Pullulan, i.e. (alpha-1,4)(alpha-1,6)-D-glucan; Derivatives thereof} [2013-01]
C08B 37/0021
. . .
{Dextran, i.e. (alpha-1,4)-D-glucan; Derivatives thereof, e.g. Sephadex, i.e. crosslinked dextran} [2013-01]
C08B 37/0024
. .
{beta-D-Glucans; (beta-1,3)-D-Glucans, e.g. paramylon, coriolan, sclerotan, pachyman, callose, scleroglucan, schizophyllan, laminaran, lentinan or curdlan; (beta-1,6)-D-Glucans, e.g. pustulan; (beta-1,4)-D-Glucans; (beta-1,3)(beta-1,4)-D-Glucans, e.g. lichenan; Derivatives thereof} [2013-01]
C08B 37/0027
. . .
{2-Acetamido-2-deoxy-beta-glucans; Derivatives thereof} [2013-01]
C08B 37/003
. . . .
{Chitin, i.e. 2-acetamido-2-deoxy-(beta-1,4)-D-glucan or N-acetyl-beta-1,4-D-glucosamine; Chitosan, i.e. deacetylated product of chitin or (beta-1,4)-D-glucosamine; Derivatives thereof} [2016-08]
C08B 37/0033
. . .
{Xanthan, i.e. D-glucose, D-mannose and D-glucuronic acid units, saubstituted with acetate and pyruvate, with a main chain of (beta-1,4)-D-glucose units; Derivatives thereof} [2013-01]
C08B 37/0036
. .
{Galactans; Derivatives thereof} [2013-01]
C08B 37/0039
. . .
{Agar; Agarose, i.e. D-galactose, 3,6-anhydro-D-galactose, methylated, sulfated, e.g. from the red algae Gelidium and Gracilaria; Agaropectin; Derivatives thereof, e.g. Sepharose, i.e. crosslinked agarose} [2017-01]
C08B 37/0042
. . .
{Carragenan or carragen, i.e. D-galactose and 3,6-anhydro-D-galactose, both partially sulfated, e.g. from red algae Chondrus crispus or Gigantia stellata; kappa-Carragenan; iota-Carragenan; lambda-Carragenan; Derivatives thereof} [2013-01]
C08B 37/0045
. .
{alpha-D-Galacturonans, e.g. methyl ester of (alpha-1,4)-linked D-galacturonic acid units, i.e. pectin, or hydrolysis product of methyl ester of alpha-1,4-linked D-galacturonic acid units, i.e. pectinic acid; Derivatives thereof} [2013-01]
C08B 37/0048
. . .
{Processes of extraction from organic materials} [2013-01]
C08B 37/0051
. .
{beta-D-Fructofuranans, e.g. beta-2,6-D-fructofuranan, i.e. levan; Derivatives thereof} [2013-01]
C08B 37/0054
. . .
{Inulin, i.e. beta-2,1-D-fructofuranan; Derivatives thereof} [2015-10]
C08B 37/0057
. .
{beta-D-Xylans, i.e. xylosaccharide, e.g. arabinoxylan, arabinofuronan, pentosans; (beta-1,3)(beta-1,4)-D-Xylans, e.g. rhodymenans; Hemicellulose; Derivatives thereof} [2013-01]
C08B 37/006
.
{Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof} [2013-01]
C08B 37/0063
. .
{Glycosaminoglycans or mucopolysaccharides, e.g. keratan sulfate; Derivatives thereof, e.g. fucoidan} [2013-01]
C08B 37/0066
. . .
{Isolation or extraction of proteoglycans from organs} [2013-01]
C08B 37/0069
. . .
{Chondroitin-4-sulfate, i.e. chondroitin sulfate A; Dermatan sulfate, i.e. chondroitin sulfate B or beta-heparin; Chondroitin-6-sulfate, i.e. chondroitin sulfate C; Derivatives thereof} [2013-01]
C08B 37/0072
. . .
{Hyaluronic acid, i.e. HA or hyaluronan; Derivatives thereof, e.g. crosslinked hyaluronic acid (hylan) or hyaluronates} [2013-01]
C08B 37/0075
. . .
{Heparin; Heparan sulfate; Derivatives thereof, e.g. heparosan; Purification or extraction methods thereof} [2013-01]
C08B 37/0078
. . . .
{Degradation products} [2013-01]
C08B 37/0081
. . . .
{Reaction with amino acids, peptides, or proteins} [2013-01]
C08B 37/0084
. .
{Guluromannuronans, e.g. alginic acid, i.e. D-mannuronic acid and D-guluronic acid units linked with alternating alpha- and beta-1,4-glycosidic bonds; Derivatives thereof, e.g. alginates} [2013-01]
C08B 37/0087
. .
{Glucomannans or galactomannans; Tara or tara gum, i.e. D-mannose and D-galactose units, e.g. from Cesalpinia spinosa; Tamarind gum, i.e. D-galactose, D-glucose and D-xylose units, e.g. from Tamarindus indica; Gum Arabic, i.e. L-arabinose, L-rhamnose, D-galactose and D-glucuronic acid units, e.g. from Acacia Senegal or Acacia Seyal; Derivatives thereof} [2013-01]
C08B 37/009
. . .
{Konjac gum or konjac mannan, i.e. beta-D-glucose and beta-D-mannose units linked by 1,4 bonds, e.g. from Amorphophallus species; Derivatives thereof} [2013-01]
C08B 37/0093
. . .
{Locust bean gum, i.e. carob bean gum, with (beta-1,4)-D-mannose units in the main chain branched with D-galactose units in (alpha-1,6), e.g. from the seeds of carob tree or Ceratonia siliqua; Derivatives thereof} [2013-01]
C08B 37/0096
. . .
{Guar, guar gum, guar flour, guaran, i.e. (beta-1,4) linked D-mannose units in the main chain branched with D-galactose units in (alpha-1,6), e.g. from Cyamopsis Tetragonolobus; Derivatives thereof} [2013-01]
C08B 37/12
.
Agar-agar; Derivatives thereof (not used) [2013-01]
C08B 37/125
. .
{Other polysaccharides of algae such as carragenan (not used)} [2016-11]
C08B 37/14
.
Hemicellulose; Derivatives thereof (not used) [2013-01]
C08B 37/143
. .
{composed by pentose units, e.g. xylose, xylan, pentosans, arabinose (not used)} [2016-11]
C08B 37/146
. .
{composed by gluco and/or galactomannans, for example guar gum, locust bean gum (not used)} [2016-11]
C08B 37/18
.
Reserve carbohydrates, e.g. glycogen, inulin, laminarin; Derivatives thereof (not used) [2013-01]