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 [Search a list of Patent Appplications for class 536]   CLASS 536,ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES
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SUBCLASSES

[List of Patents for class 536 subclass 1.11]    1.11Carbohydrates and derivatives:
 This subclass is indented under subclass 1.  Compounds which are carbohydrates or derivatives thereof, i.e., those compounds which satisfy one of the three criteria set forth below (unless otherwise indicated, figures are representative examples only):Criterion 1: compounds whose monomeric units are polyhydroxy mono-aldehydes [1, 2] or polyhydroxy mono-ketones [3, 4] having the formula Cn(H2O)n (wherein n = 5 or 6 – subsequent references to "n" refer to these values), i.e., "acyclic saccharides," of which representative samples are:

D-ribose [1]

D-ribose [1]

D-glucose [2]

D-glucose [2]

D-ribulose [3]

D-ribulose [3]

D-fructose [4] Criterion 2: the corresponding cyclic hemiacetals, i.e. 'cyclic saccharides' of which representative examples are:

D-fructose [4] Criterion 2: the correspondingcyclic hemiacetals, i.e. "cyclic saccharides" of which representative examples are:

a-D-ribose D-ribofuranose [5]

a-D-ribose D-ribofuranose [5]

a-D-glucose D-glucopyranose [6]

a-D-glucose D-glucopyranose [6]

a-D-glucose D-glucopyranose [7]

a-D-glucose D-glucopyranose [7]

a-D-glucose D-glucopyranose [8] wherein: (i) figure [5] is the cyclic form of figure [1], (ii) figures [6-8] each depict, in a different way, a-D-glucose, which is one of the two cyclic forms of D-glucose shown in figure [2], (iii) figure [2] is a Fischer projection, figure [6] is a conformational projection, figure [7] is a Haworth projection, and figure [8] is a Mills projection, (iv) the number one carbon atom, the asterisked carbon atom, is the hemiacetal carbon and is also known as the anomeric carbon. Criterion 3: the derivatives of (1) or (2) wherein: (a) for acyclic saccharides, (i) the 5 or 6 carbon member skeleton and the carbonyl function are not destroyed, (ii) there are no fewer than (n - 2) total -OR moieties directly bonded to the carbon skeleton (wherein R is H or a group bonded to oxygen through carbon), (iii) no more than one oxygen atom is attached to any one carbon of the carbon skeleton, and structures [9-14] are illustrative:

a-D-glucose D-glucopyranose [8] wherein:(i) figure [5] is the cyclic form of figure [1], (ii) figures [6-8] each depict, in a different way, a-D-glucose, which is one of the two cyclic forms of D-glucose shown in figure [2], (iii) figure [2] is a Fischer projection, figure [6] is a conformational projection, figure [7] is a Haworth projection, and figure [8] is a Mills projection, (iv) the number one carbon atom, the asterisked carbon atom, is the hemiacetal carbon and is also known as the anomeric carbon. Criterion 3: the derivatives of (1) or (2) wherein: (a) for acyclic saccharides, (i) the 5 or 6 carbon member skeleton and the carbonyl function are not destroyed, (ii) there are no fewer than (n - 2) total –OR moieties directly bonded to the carbon skeleton (wherein R is H or a group bonded to oxygen through carbon), (iii) no more than one oxygen atom is attached to any one carbon of the carbon skeleton, and structures [9-14] are illustrative:

[9]

[9]

[10]

[10]

[11]

[11]

[12]

[12]

[13]

[13]

[14] (b) for cyclic saccharides, except for C-glycosyl compounds described in section, and (c) there can be substitution by moieties which do not destroy the cyclic saccharide structure as long as at least one -XH or -XR group is bonded directly to the hemiacetal/anomeric carbon (this carbon is denoted with an asterisk in the figures below), wherein X is -O-, -S-, or -NR subscript S- and R is H or a group bonded to X through carbon and R subscript S is a substituent which completes the valency of the nitrogen atom, and figures [15-18] represent the minimum structure necessary to constitute a cyclic saccharide derivative:

[14] (b) for cyclicsaccharides, except for C-glycosyl compounds described in section, and (c) there can be substitution by moieties which do not destroy the cyclic saccharide structure as long as at least one –XH or –XR group is bonded directly to the hemiacetal/anomeric carbon (this carbon is denoted with an asterisk in the figures below), wherein X is –O–, –S–, or –NRS– and R is H or a group bonded to X through carbon and RS is a substituent which completes the valency of the nitrogen atom, and figures [15-18] represent the minimum structure necessary to constitute a cyclic saccharide derivative:

[15] n=5

[15] n=5

[16] n=6

[16] n=6

[17] n=6

[17] n=6

[18] n=6 wherein: - at least one of the R subscript 1 (where n = 5) or at least two of the R subscript 1 (where n = 6) must be -OR wherein R is H or a group bonded to the oxygen of -OR through carbon; and the representation of the bond between XR and the ring position 1 in ech of the structures [15-18] signifies an a (i.e., axial) or b (i.e., equatorial) configuration (c) for cyclic saccharide, C-glycosyl-type compounds (also known as C-glycosides) (i) C-glycosyl compounds will have the structure defined below [19-21]

[18] n=6 wherein: - at leastone of the R1 (where n = 5) or at least two of the R1 (where n = 6) must be –OR wherein R is H or a group bonded to the oxygen of –OR through carbon; and the representation of the bond between XR and the ring position 1 in ech of the structures [15-18] signifies an a (i.e., axial) or b (i.e., equatorial) configuration (c) for cyclic saccharide, C-glycosyl-type compounds (also known as C-glycosides) (i) C-glycosyl compounds will have the structure defined below [19-21]

[19] n=5

[19] n=5

[20] n=6

[20] n=6

[21] n=6 wherein: - at least one of the R subscript 1 (where n = 5) or at least two of the R subscript 1 (where n = 6) must be -OR wherein R is H or group bonded to the oxygen of -OR through carbon; - R subscript 2, R subscript 3, and R subscript 4 alone or in combination can be any substituent which completes the valency of the carbon atom. (ii) 'C-glycoside', although often used in the art to represent this type compound, is a misnomer-'C-glycosyl' is the proper term.

[21] n=6 wherein: - at leastone of the R1 (where n = 5) or at least two of the R1 (where n = 6) must be –OR wherein R is H or group bonded to the oxygen of –OR through carbon; - R2, R3, and R4 alone or in combination can be any substituent which completes the valency of the carbon atom. (ii) "C-glycoside", although often used in the art to represent this type compound, is a misnomer–"C-glycosyl" is the proper term.

(1) Note. All statements in this sublass definition are intended to be inclusive of all spatial and stereochemical configurations, except if otherwise specified.
(2) Note. Oxygen heteroatom-containing cyclic compounds lacking any –XH or –XR bonded to the anomeric carbon of the cyclic structure are not carbohydrates/cyclic hemiacetals; such compounds are tetrahydrofurans [22] or tetrohydropyrans [23, 24]:

Tetrahydrofuran [22]

Tetrahydrofuran [22]

Tetrahydropyran [23]

Tetrahydropyran [23]

Tetrahydropyran [24]

Tetrahydropyran [24]

(3) Note. Included within the scope of this class are compounds wherein oxygens which are attached to carbons of the carbohydrate skeleton are also attached to the same alkylidene or substitued alkylidene groups. See, for example, structures [25-29].

[25]

[25]

[26]

[26]

[27]

[27]

[28]

[28]

[29]

[29]

(4) Note. Carbohydrate degradation products which contain fewer than five carbon atoms in the carbohydrate moiety are not provided for in this class, but are classified elsewhere in the chemical compound area.
(5) Note. Alcohol, acid, and amine derivatives of carbohydrates which are formed by an alcohol, carboxylic acid, or amine function replacing the oxygen of the carbonyl group of an acyclic carbohydrate are not provided for in this class, but are classified elsewhere.
(6) Note. The heteroatom of the cyclic carbohydrate must be an oxygen. Compounds with different heteroatoms or compounds without a heteroatom in the cyclic structure (e.g. inositol) are not classified in this class; they are classified elsewhere.
(7) Note. Some names of common carbohydrates include: Monosaccharides: Fructose (Fru), Fucose (Fuc), Galactosamine (GalN), Galactose (Gal), Glucosamine (GlcN), Glucose (Glc), Glucuronic acid (GlcA), Idose (Ido), Mannose (Man), Neuraminic acid (e.g., Neu5Ac, etc.), Sialic acid, Xylose (Xyl). Oligosaccharides: Cyclodextrin, Lactose (Lac), Maltose, Raffinose, Sialyl Lewis x (sLex), Sucrose, Trehalose. Homopolysaccharides (all the monomeric units are the same): Amylose/Amylopectin, Cellulose, Chitin/Chitosan, Dextran, Glucan, Inulin, Starch. Heteropolysaccharides (different monomers comprise the repeating unit): Algin/Alginic acid, Bacterial/capsular polysaccharides; Glycosaminoglycans (Mucopolysaccharides including Chondroitin sulfate, Dermatan sulfate, Heparin, Heparan sulfate, Hyaluronic acid, Keratan sulfate); Gums, Mannans, Pectins, Xylan.

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22.1through 24.5, for nucleic acids and oligomeric or polymeric forms thereof, including DNA or RNA fragments (e.g., genes, etc.)

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127, Sugar, Starch, and Carbohydrates,   subclasses 36 through 41for hydrolysis of carbohydrates by nonbiochemical methods wherein the process stops with such hydrolysis or is followed by purification, concentration, or crystallization of the sugar or sugar solution thereby produced.
162, Paper Making and Fiber Liberation,   appropriate subclasses for liberating, recovering, or purifying of cellulose fibers from natural sources.
424, Drug, Bio-Affecting and Body Treating Compositions,   subclass 1.73 for carbohydrates attached to radionuclides; subclasses 9.35-9.351 for carbohydrates attached to magnetic imaging agents; and subclass 9.43 for carbohydrates attached to X-ray contrast imaging agents.
428, Stock Material or Miscellaneous Articles,   subclasses 532 through 537.7for a nonstructural laminate containing a carbohydrate.
435, Chemistry: Molecular Biology and Microbiology,   subclasses 72 through 105for enzymatic or microbial processes for synthesizing a saccharide containing compound; subclasses 274-279 for using an enzyme or microorganism to recover or purify a carbohydrate material from animal, plant, or microbial material.
506, Combinatorial Chemistry Technology: Method, Library, Apparatus,   for a carbohydrate library and a process of creating said library.
514, Drug, Bio-Affecting and Body Treating Compositions,   subclasses 23 through 62for pharmaceutical and cosmetic compositions containing a carbohydrate as the active ingredient.
527, Synthetic Resins or Natural Rubbers,   subclasses 300 through 315for a solid polymer derived from a carbohydrate or derivative reactant and an ethylenic reactant, a SICP or a SPFI or a process of preparing said polymer.
530, Chemistry: Natural Resins or Derivatives; Peptides or Proteins; Lignins or Reaction Products Thereof,   subclasses 395 through 398for glycoproteins such as proteoglycans, mucins, etc.
544, Organic Compounds,   appropriate subclasses for purines and pyrimidines which do not have a carbohydrate attached.
549, Organic Compounds,   subclass 315 for ascorbic acid; subclasses 356-428 for tetrahydropyrans; and subclasses 429-509 for tetrahydrofurans. Such tetrahydropyrans and tetrahydrofurans lack an –XH or –XR bonded to what would be the anomeric carbon atom of a cyclic saccharide.
562, Organic Compounds,   subclasses 512 through 609for compounds wherein a carboxylic acid group has replaced the carbonyl function of an acyclic carbohydrate, especially subclass 597 for oxalic acid.
564, Organic Compounds,   for compounds wherein an amine function has replaced the carbonyl function of an acyclic carbohydrate.
568, Organic Compounds,   subclasses 852 through 872for compounds wherein an alcohol group has replaced the carbonyl group of an acyclic carbohydrate.
  
[List of Patents for class 536 subclass 2]    2Pectin or derivative
 This subclass is indented under subclass 1.11.  Compounds which are pectins and reaction products thereof.

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426, Food or Edible Material: Processes, Compositions, and Products,   subclass 577 , for food compositions containing pectin.
  
[List of Patents for class 536 subclass 3]    3Algin or derivative
 This subclass is indented under subclass 1.11.  Compounds which are algins or reaction products thereof.

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426, Food or Edible Material: Processes, Compositions, and Products,   subclass 656 , for food compositions containing algin.
  
[List of Patents for class 536 subclass 4.1]    4.1O- or S-Glycosides:
 This subclass is indented under subclass 1.11.  Compounds which an acetal or thiocetal derivatives of the cyclic forms of sugars in which the hydrogen atom of the hemiacetal hydroxyl or hemithioacetal sulfhydryl group has been replaced by an alkyl, aralkyl, or aryl group.
(1) Note. An O- or S- glycoside is basically a compound having a sugar moeity connected to an aglycone moiety via oxygen or sulfur.
(2) Note. On complete hydrolysis these compounds yield one or more monosaccharides, and mono or polyhydric alcohol or phenol, or sulfur analogs thereof.
(3) Note. The cyclic sugars referred to in the definitions are normally pyranoses or furanoses.
(4) Note. Glycosides derived from aldoses are referred to as aldosides, and those from ketoses are ketosides.
(5) Note. This subclass includes arbutin, amygdalin, and salicin, etc.

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2,for pectins.

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560, Organic Componds,   subclass 68 for tannins some of which are probably glycosides.
  
[List of Patents for class 536 subclass 4.4]    4.4Aescin or derivative:
 This subclass is indented under subclass 4.1.  Products which consist of a mixture of sapogenin glycosides (saponins) obtained from the seed of the horse chestnut tree (Aesculus hippocastanum).
  
[List of Patents for class 536 subclass 5]    5Cyclopentanohydrophenanthrene ring system
 This subclass is indented under subclass 4.1.  Compounds in which the aglycone moiety of the glycoside contains a cyclopentanohydrophenanthrene nucleus.
  
[List of Patents for class 536 subclass 6]    6Oxygen containing six-membered hetero ring (e.g., oxathiane, etc.)
 This subclass is indented under subclass 5.  Compounds wherein a six- membered hetero-O-cyclic substituent is connected directly to a carbon atom of the cyclopentanohydrophenathrene nucleus.
  
[List of Patents for class 536 subclass 6.1]    6.1Oxygen containing five-membered hetero ring:
 This subclass is indented under subclass 5.  Compounds wherein a five-membered hetero-O-cyclic substitutent is connected directly to a carbon atom of the cyclopentanohydrophenanthrene nucleus.
(1) Note. This subclass includes, for example, neutral saponins and glycosides having an aglycone moeity described as cardenolide. Acid saponins (i.e., triterpenoid saponins) are not subject matter for this subclass. For purposes of classification, saponins which are not designated as acid or neutral are considered neutral and are classified herein.

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4.1,for acid saponins (i.e., triterpenoid saponins) which are known not to contain the cyclopentanohydrophenanthrene nucleus.
4.4,for aescin or derivatives.
  
[List of Patents for class 536 subclass 6.2]    6.2Nitrogen, phosphorus or halogen containing:
 This subclass is indented under subclass 6.1.  Compounds which contain nitrogen, phosphourus, or halogen.
  
[List of Patents for class 536 subclass 6.3]    6.3Processes of extracting from plant materials:
 This subclass is indented under subclass 6.1.  Processes which include extracting the compound from plant materials.
  
[List of Patents for class 536 subclass 6.4]    6.4Daunomycin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula and derivatives thereof:

Image 1 for class 536 subclass 6.4

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16.8,for glycoside antibiotics structurally similar to daunomycin wherein the anthracycline structure is destroyed or wherein the amino group is removed from daunosamine.
18.7,for daunosamine, per se.
  
[List of Patents for class 536 subclass 6.5]    6.5Oxygen containg hetero ring of at least twenty ring members (e.g., amphotercin, nystatin, pimaricin, etc.):
 This subclass is indented under subclass 4.1.  Compounds which contain a hetero-O-cyclic substitutent of twenty or more ring members.
(1) Note. The compounds provided for herein are commonly referred to as "macrolide antibiotics" or "polyene macrolide antibiotics". They include a macrocyclic lactone ring with various ketonic an hydroxyl functions glycosidically bound to deoxysugars. As representative of this class of compounds there may be mentioned amphotericin A, amphotericin B, candicidin, nystation, perimycin, and pimaricin.
(2) Note. Examples of compounds provided for herein are:

Image 1 for class 536 subclass 6.5

Image 2 for class 536 subclass 6.5

  
[List of Patents for class 536 subclass 7.1]    7.1Oxygen containing hetero ring having 12-19 members (e.g., methymycin, carbomycin, spiramycin, etc.):
 This subclass is indented under subclass 4.1.  Compounds which contain a hetero-O-cyclic substitutent of twelve or more ring members.
(1) Note. Examples of compounds provided for herein are:

Image 1 for class 536 subclass 7.1

Image 2 for class 536 subclass 7.1

  
[List of Patents for class 536 subclass 7.2]    7.2Erythromycin or derivative (e.g., oleandomycin, etc.):
 This subclass is indented under subclass 7.1.  Compounds which have the following structure and derivatives thereof wherein the three-part structure shown is not destroyed, and wherein the dimethylamine group of desosamine is not removed, but may be substituted.

Image 1 for class 536 subclass 7.2

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7.1,for desdimethylamine erythromycins.
18.7,for desosamine, per se.
  
[List of Patents for class 536 subclass 7.3]    7.3Boron, phosphorus or sulfur containing:
 This subclass is indented under subclass 7.2.  Compounds which contain boron, phosphorus, or sulfur.
  
[List of Patents for class 536 subclass 7.4]    7.4Additional nitrogen containing:
 This subclass is indented under subclass 7.2.  Compounds which contain at least one nitrogen other than the desosamine nitrogen.
  
[List of Patents for class 536 subclass 7.5]    7.5Purification or recovery:
 This subclass is indented under subclass 7.2.  Processes which include separating the compound from impurities or from the reaction mixture.
  
[List of Patents for class 536 subclass 8]    8Flavon sugar compounds
 This subclass is indented under subclass 4.1.  Compounds which upon hydrolysis yield a sugar, or mixture of sugars, and the anthoxanthins.
(1) Note. The anthoxanthins include the flavones, the flavonols, the flavonones, the isoflavones and the xanthones.
(2) Note. The compounds are usually plant pigments.
(3) Note. The subclass provides for rutin, quercitrin, hesperidin, citronin and eriodictin, etc.
(4) Note. The flavone moiety is the aglycone portion of the compound.
  
[List of Patents for class 536 subclass 8.8]    8.8Coumermycin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.:

Image 1 for class 536 subclass 8.8

  
[List of Patents for class 536 subclass 13]    13Novobiocin or derivative
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.

Image 1 for class 536 subclass 13

  
[List of Patents for class 536 subclass 13.1]    13.1Antibiotic BM 123 or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following isomeric structural formulae (below) and derivatives thereof.:

Image 1 for class 536 subclass 13.1

  
[List of Patents for class 536 subclass 13.2]    13.2Neomycin B or neomycin C or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formulae (below): and derivatives, complexes, or mixtures thereof.

Image 1 for class 536 subclass 13.2

  
[List of Patents for class 536 subclass 13.3]    13.3Paromomycin or derivative (e.g., neomycin E, etc.):
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.:

Image 1 for class 536 subclass 13.3

  
[List of Patents for class 536 subclass 13.4]    13.4Antibiotic XK or derivative:
 This subclass is indented under subclass 4.1.  Compounds which may have any of the following structural formulae (below) and derivatives thereof.

Image 1 for class 536 subclass 13.4

(1) Note. Included herein are antibiotics of the XK-88 series, such as XK-88-5, also named seldomycin factor 5, and those of the XK-62 series, such as XK-62-2.
  
[List of Patents for class 536 subclass 13.5]    13.5Butirosin or derivative (e.g., ambutyrosin, etc.):
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.

Image 1 for class 536 subclass 13.5

  
[List of Patents for class 536 subclass 13.6]    13.6Gentamicin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the folllowing structural formula (below) and derivatives thereof.

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[List of Patents for class 536 subclass 13.7]    13.7Kanamycin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula: (below) and derivatives thereof.

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[List of Patents for class 536 subclass 13.8]    13.8Carbonyl bonded directly to kanamycin nitrogen:
 This subclass is indented under subclass 13.7.  Compounds which include at least one carbonyl group directly bonded to a nitrogen of kanamycin.
  
[List of Patents for class 536 subclass 13.9]    13.9Sisomicin or derivative:
 This subclass is indented under subclass 4.1.  Compoounds which have the following structural formula (below) and derivatives thereof.

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[List of Patents for class 536 subclass 14]    14Streptomycin or derivative
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) or which have the structure of any of the three main components shown in the formula; and derivatives thereof.

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[List of Patents for class 536 subclass 15]    15Dihydrostreptomycin or derivative
 This subclass is indented under subclass 14.  Compounds which are reduction products of streptomycin and have the following formula (below) and derivatives thereof.

Image 1 for class 536 subclass 15

  
[List of Patents for class 536 subclass 16]    16Addition compounds
 This subclass is indented under subclass 14.  Compounds which result from an addition-type reaction of streptomycin, or a derivative thereof, with another compound.
(1) Note. This subclass provides for the addition salts formed by reacting streptomycin with metal halides, organic amines, organic or inorganic acids, etc.
  
[List of Patents for class 536 subclass 16.1]    16.1Fortimicin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.

Image 1 for class 536 subclass 16.1

  
[List of Patents for class 536 subclass 16.2]    16.2Lincomycin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.

Image 1 for class 536 subclass 16.2

  
[List of Patents for class 536 subclass 16.3]    16.3Cyano or -COO- containing:
 This subclass is indented under subclass 16.2.  Compounds which contain a -CN or -COO group.
  
[List of Patents for class 536 subclass 16.4]    16.4Additional sulfur containing:
 This subclass is indented under subclass 16.2.  Compounds which contain at least two sulfurs.
  
[List of Patents for class 536 subclass 16.5]    16.5Phosphorus or halogen containing:
 This subclass is indented under subclass 16.2.  Compounds which contain phosphorus or halogen.
  
[List of Patents for class 536 subclass 16.6]    16.6Neamine or derivative (e.g., neomycin A, etc.):
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.

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[List of Patents for class 536 subclass 16.7]    16.7Kasugamycin or derivative:
 This subclass is indented under subclass 4.1.  Compounds which have the following structural formula (below) and derivatives thereof.

Image 1 for class 536 subclass 16.7

  
[List of Patents for class 536 subclass 16.8]    16.8Antibiotics:
 This subclass is indented under subclass 4.1.  Compounds which have the capacity to inhibit the growth of or destroy micro-organisms and are generally emplyed to kill disease in aperson or animal.
(1) Note. Anibiotics are generally produced by a bacterium or fungus, however, such processes are not provided for herein.
(2) Note. The compound may be antibacterial or antifungal.
(3) Note. This subclass provides for antibiotics which are not provided for in specific antibiotic subclasses above.

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435, Chemistry: Molecular Biology And Microbiology,   for processes of making antibiotics by cultivating micro-oganisms.
  
[List of Patents for class 536 subclass 16.9]    16.9Purification or recovery:
 This subclass is indented under subclass 16.8.  Processes which include separating the antibiotic(s) from inpurities or from the reaction mixture.
  
[List of Patents for class 536 subclass 17.1]    17.1Boron, phosphorus, heavey metal or aluminum containing:
 This subclass is indented under subclass 4.1.  Compounds which contain boron, phosphorus, a metal having a specific gravity greater than four, or aluminum.
  
[List of Patents for class 536 subclass 17.2]    17.2Nitrogen containing:
 This subclass is indented under subclass 4.1.  Compound which contain nitrogen.
  
[List of Patents for class 536 subclass 17.3]    17.3Nitrogen containing hetero ring:
 This subclass is indented under subclass 17.2.  Compounds which contain nitrogen containing heterocyclic ring.
  
[List of Patents for class 536 subclass 17.4]    17.4Nitrogen in aglycone moiety:
 This subclass is indented under subclass 17.3.  Compound which contain nitrogen in the aglycone (nonsugar) moiety of the glycoside.
  
[List of Patents for class 536 subclass 17.5]    17.5Sulfur containing (e.g., methylthiolincosaminide, etc.).:
 This subclass is indented under subclass 17.2.  Compounds which contain sulfur.
  
[List of Patents for class 536 subclass 17.6]    17.6Nitrogen or sulfur in aglycone moiety:
 This subclass is indented under subclass 17.5.  Compounds which contain nitrogen or sulfur in the aglycone (nonsugar) moiety of the glycoside.
  
[List of Patents for class 536 subclass 17.7]    17.7Nitro or nitroso containing:
 This subclass is indented under subclass 17.2.  Compounds which contain nitro or nitroso.
  
[List of Patents for class 536 subclass 17.8]    17.8Nitrogen in aglycone moiety:
 This subclass is indented under subclass 17.7.  Compounds which contain nitrogen in the aglycone (nonsugar) moiety of the glycoside.
  
[List of Patents for class 536 subclass 17.9]    17.9Nitrogen in aglycone moiety:
 This subclass is indented under subclass 17.2.  Compounds which contain nitrogen in the aglycone (nonsugar) moiety of the glycoside.
  
[List of Patents for class 536 subclass 18.1]    18.1Polycyclo ring system (e.g., hellebrin, etc.):
 This subclass is indented under subclass 4.1.  Compounds which contain a polycyclo ring system.
  
[List of Patents for class 536 subclass 18.2]    18.2Containing -C(=X)X- wherein the X"s are the same or diverse chalcogens:
 This subclass is indented under subclass 4.1.  Compounds which contain a -C(=X)X- group wherein the X"s are the same of diffierent and are O, S, Se, or Te.
  
[List of Patents for class 536 subclass 18.3]    18.3Plural oxyalkylene groups bonded directly to each other.
 This subclass is indented under subclass 4.1.  Compounds which contain two or more successive oxyalkylene groups.
  
[List of Patents for class 536 subclass 18.4]    18.4Halogen containing:
 This subclass is indented under subclass 4.1.  Compounds which contain halogen.
  
[List of Patents for class 536 subclass 18.5]    18.5Processses:
 This subclass is indented under subclass 4.1.  Processes which are directed to the preparation, purification, recovery, stabilization of treatment of an O- or S- glycoside.
  
[List of Patents for class 536 subclass 18.6]    18.6Reacting a carbohydrate with an organic -O- containing compound (e.g., reacting glucose with methanol, etc.)
 This subclass is indented under subclass 18.5.  Processes which include perparing the glycoside by reacting a carbohydrate with an organic compound containing -O-.
  
[List of Patents for class 536 subclass 18.7]    18.7Nitrogen containing:
 This subclass is indented under subclass 1.1.  Compounds which are nitrogen containing derivatives of carbohydrates.
  
[List of Patents for class 536 subclass 20]    20Chitin or derivative
 This subclass is indented under subclass 18.7.  Compounds which upon acid hydrolysis yield acetylglucosamine and which are polysaccharides having the following repeating unit (below) and derivatives thereof.

Image 1 for class 536 subclass 20

(1) Note. Chitin is a horny substance that forms part of the hard outer shell of insects and crustaceans and is structurally similar to cellulose.
  
[List of Patents for class 536 subclass 21]    21Heparin or derivative
 This subclass is indented under subclass 18.7.  Compounds which are polysaccharides containing the following repeating unit wherein the degree of sulfation of the individual components in the polysaccharide is apparently not uniform and may vary at different areas of the carbohydrate chain, and derivatives thereof.

Image 1 for class 536 subclass 21

(1) Note. Heparin is a natural substance which can be found in various tissues of mammals, especially the lung, spleen, liver and muscle, and has been used medicinally for coagulation of blood and metabolism of lipids.
  
[List of Patents for class 536 subclass 22.1]    22.1N-glycosides, polymers thereof, metal derivatives (e.g., nucleic acids, oligonucleotides, etc.):
 This subclass is indented under subclass 18.7.  Compounds which are glycosidic derivatives of the cyclic forms of sugars in which the aglycone portion is attached thru nitrogen to the sugar moiety by substituting it for the hemiacetal hydroxyl of the sugar.
(1) Note. The compounds included herein are N-glycosides, nucleic acids, oligonucleotides, metal derivatives of nucleic acids, etc.
(2) Note. A nucleoside is an N-glycoside wherein the aglycone portion is a pyrimidine ring or a purine ring system attached thru ring nitrogen to a pentose sugar (either a ribose or a deoxyribose).