What follows are the subclasses from one class of the Manual of Classification for US patents. As you scroll through the list and encounter a class/subclass of interest, you can jump back to the top and retrieve patent titles by entering the class/subclass in the box below.
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363-131 121-55A 14-.5
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Class Number: 71
Class Title: CHEMISTRY: FERTILIZERS
Subclass Subclass
Number Title
1 PROCESSES AND PRODUCTS
5 .For mushrooms
6 .Bacterial
7 ..Nitrogen fixing or nitrifying
8 ..Fermentation
9 ...Aerobic
10 ...Anaerobic
11 .Organic material-containing
12 ..From sewage or night soil
13 ...With other organic material
14 ..From garbage
15 ..From animal matter
16 ...Marine animals
17 ...Blood
18 ...Horn, hair, feathers, wool, leather, etc.
19 ...Bone
20 ....With other organic matter
21 ...Guano, stable manure, etc.
22 ...With other organic material
23 ..From vegetation
24 ...Peat, humus material, coal, etc.
25 ..From industrial wastes
26 ...Sugar or distillery
27 ..From synthetic material
28 ...Urea and its derivatives
29 ....With phosphorus-containing substances
30 ....With nitrogen-containing substances
31 .Inorganic material
32 ..Phosphorus-containing
33 ...Phosphates
34 ....Alkali metal and ammonium only
35 .....Nitrogen-containing
36 .....Alkali metal- and ammonium-containing
37 ....Acid treatment
38 .....Gaseous
39 .....Nitric and hydrochloric
40 .....Sulfuric acid
41 .....Acids of phosphorus
42 ....Alkaline treatment
43 ....Neutralization
44 ....Heat-treatment
45 .....Alkali metal and silicon values
46 .....Alkali metal values
47 .....Carbonates, oxides, sulfates, silicon, and halides
48 ....Products
49 .....Nitrogen-containing
50 ......Nitrates
51 .....Alkali metal- and ammonium-containing
52 .....Silicon-containing
53 .....Containing carbonates, oxides, sulfates, or halides
54 ..Nitrogen-containing (except ammonium)
55 ...Cyanamidee
56 ....Nitrogen-containing (except ammonium)
57 ....Alkali metal or ammonium-containing
58 ...Nitrates
59 ....With alkali metal or ammonium compound
60 ....With carbonates, oxides, sulfates, or halides
61 ..Alkali metal or ammonium
62 ..Silicon-containing
63 ..Carbonates, oxides, sulfates, halides, etc.
64.01 .Forms or conditioning
64.02 ..Coating and granulating
64.03 ..Granulating
64.04 ...By comminuting
64.05 ...By agglomerating
64.06 ...By fluid contact
64.07 ..Coating
64.08 ..Slurry or suspension
64.09 ..Gel
64.1 ..Liquid
64.11 ..Controlled release
64.12 ..Anticaking
64.13 ..Forms having structure, e.g., particle size, dimensions,
etc.
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* CROSS-REFERENCE ART COLLECTIONS
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900 FOAMS
901 REFUSE CONDITIONING
902 NITRIFICATION INHIBITION
903 SOIL CONDITIONER
904 CARRIER
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* DIGESTS
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DIG 1 Adjuvant (e.g., carrier, particle size, etc.)
DIG 2 Chelating agent
DIG 3 Defluorination
DIG 4 ANTI-CORROSION