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Class Information
Number: 71
Name: Chemistry: fertilizers >
Description: This class is directed to methods of production and manufacture of substances having a nutrient action on plant growth. It also includes the products of such methods and compositions or mixtures having these characteristics, and forms of chemical compounds or mixtures peculiarly adapted and designed to make them more available for use and distribution as a fertilizer.










Class Number Class Name No. of Patents
71/DIG.4

Anti-corrosion

16
71/904

Carrier

142
71/DIG.2

Chelating agent

84
71/DIG.3

Defluorination

11
71/900

Foams

16
71/902

Nitrification inhibition

70
71/1

Processes and products

97
71/6

Bacterial

142
71/8

Fermentation

80
71/9

Aerobic

308
71/10

Anaerobic

131
71/7

Nitrogen fixing or nitrifying

87
71/5

For mushrooms

63
71/64.01

Forms or conditioning

54
71/64.12

Anticaking

80
71/64.02

Coating and granulating

80
71/64.07

Coating

210
71/64.11

Controlled release

305
71/64.13

Forms having structure, e.g., particle size, dimensions, etc.

218
71/64.09

Gel

32
71/64.03

Granulating

108
71/64.05

By agglomerating

63
71/64.04

By comminuting

38
71/64.06

By fluid contact

51
71/64.1

Liquid

256
71/64.08

Slurry or suspension

137
71/31

Inorganic material

183
71/61

Alkali metal or ammonium

160
71/63

Carbonates, oxides, sulfates, halides, etc.

293
71/54

Nitrogen-containing (except ammonium)

91
71/55

Cyanamide

11
71/57

Alkali metal or ammonium-containing

17
71/56

Nitrogen-containing (except ammonium)

10
71/58

Nitrates

103
71/59

With alkali metal or ammonium compound

105
71/60

With carbonates, oxides, sulfates, or halides

65
71/32

Phosphorus-containing

119
71/33

Phosphates

146
71/37

Acid treatment

41
71/41

Acids of phosphorus

68
71/38

Gaseous

3
71/39

Nitric and hydrochloric

18
71/40

Sulfuric acid

42
71/34

Alkali metal and ammonium only

227
71/36

Alkali metal- and ammonium-containing

66
71/35

Nitrogen-containing

46
71/42

Alkaline treatment

18
71/44

Heat-treatment

21
71/45

Alkali metal and silicon values

6
71/46

Alkali metal values

3
71/47

Carbonates, oxides, sulfates, silicon, and halides

14
71/43

Neutralization

109
71/48

Products

34
71/51

Alkali metal- and ammonium-containing

39
71/53

Containing carbonates, oxides, sulfates, or halides

69
71/49

Nitrogen-containing

28
71/50

Nitrates

33
71/52

Silicon-containing

11
71/62

Silicon-containing

71
71/11

Organic material-containing

351
71/15

From animal matter

164
71/17

Blood

26
71/19

Bone

22
71/20

With other organic matter

20
71/21

Guano, stable manure, etc.

179
71/18

Horn, hair, feathers, wool, leather, etc.

27
71/16

Marine animals

47
71/22

With other organic material

46
71/14

From garbage

92
71/25

From industrial wastes

143
71/26

Sugar or distillery

53
71/12

From sewage or night soil

180
71/13

With other organic material

133
71/27

From synthetic material

312
71/28

Urea and its derivatives

413
71/30

With nitrogen-containing substances

196
71/29

With phosphorus-containing substances

207
71/23

From vegetation

235
71/24

Peat, humus material, coal, etc.

194
71/901

Refuse conditioning

63
71/903

Soil conditioner

322
 
 
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