Monty Hyams (1918-2013): Patent Information Pioneer

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Subject coverage completes its expansion (1980)

The topics covered by DWPI  grew by 1980 to the full extent as follows (as summarised in 2010)

Derwent Class (Section) Definition Earliest Date Covered Chemical Patents Index (CPI) A Polymers and Plastics 1966 B Pharmaceuticals 1963 C Agricultural Chemicals 1965 D Food, Detergents, Water Treatment and Biotechnology 1970 E General Chemicals 1970 F Textiles, Paper Making 1970 G Printing, Coating, Photographic 1970 H Petroleum 1970 J Chemical Engineering 1970 K Nucleonics, Explosives, Protection 1970 L Refractories, Ceramics, Cement, Electro(in)organics 1970 M Metallurgy 1970 Engineering Patents Index (EngPI, formerly GMPI) P General (engineering) 1974 Q Mechanical (engineering) 1974 Electrical Patents Index (EPI) R Electrical (Later superseded by sections S-X below. The backlog was reclassified accordingly) 1974-1979 S Instrumentation, Measuring and Testing 1980 T Computing and Control 1980 U Semiconductors and Electronic Circuitry 1980 V Electronic Components 1980 W Communications 1980 X Electric Power Engineering 1980

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