1000
900
800
700
600
500
400
300
200
100
0
TABLE E (Cont.)
Patents registered in Hong Kong 1980 - 1990
Class C
01
02
03
04
05
06
07
08
09
10
11
12
13
14
21
22
23
25
30
383
1 2 3 4 5 6 7
8 9 10 11 12 13 14 21 22 23 25 30
Section C Chemistry and Metallurgy
Inorganic chemistry
Treating water, waste water and sewage
Glass; Mineral and slag wool
Cements; Ceramics etc.; Sound or thermal insulating materials
Manufacture of fertilisers
Explosives; Matches
Organic chemistry
Macromolecular components; Their preparation and chemical working up; Compositions based thereon
Dyes; Paints; Polishes; Natural Resins; Adhesives; Miscellaneous Compositions;
Petroleum, gas and coke industries; Technical gases containing carbon monoxide; Fuels; Lubricants; Peat
Animal and vegetable oils, fats, fatty substances, and waxes; Fatty acids therefrom; Detergents; Candles
Fermentation industry; Beer Spirits; Wine; Vinegar; Yeast
Sugar and starch industry
Skins; Hides; Pelts; Leather
Metallurgy of iron
Metallurgy; Ferrous or Non-Ferrous Alloys; Treatment of alloys or non-ferrous metals
Working and treatment of metals, other than by mechanical means; Covering materials with metals; Inhibiting corrosion or incrustation in general Electrolytic or electrophoretic processes; Apparatus therefor
Crystal growth
67
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