Derwent Classification System: Agricultural Chemicals

Patents covering compounds of agricultural and veterinary interest are included:

Pest growth control agents: Insecticides, miticides, rodenticides, molluscicides, slugicides, vermicides (nematocides, anthelmintics, etc.) soil fumigants, pest repellents and attractants. Biological control; microorganisms, predators and natural products.

Plant growth control agents: Herbicides, weedicides, defoliants, desiccants, fruit drop and set controllers, rooting compounds, sprouting inhibitors, growth stimulants and retardants, moss and lichen controllers. Plant genetics.

Plant disease control agents: Fungicides, viricides, timber preservatives and bactericides.

Soil improvement agents: Fertilisers, trace metal additives, bacterial action control stimulants and soil consolidation agents if for agricultural purposes.

Veterinary products: Disease control agents, nutritional agents, veterinary vaccines.

For each compound where more than one of the classifications given below could be assigned, then the order of priority is C01 before C02 and C02 before C03.

C01 Organophosphorus; organometallic - ie compounds containing other than H, C, N, O, S and halogen.
C02 Heterocyclic.
C03 Other organic compounds, inorganic compounds and multi-component mixtures. Polymers and proteins.
C04 Fertilisers - including urea and phosphoric acid production. Also soil modifiers and plant growth media. Chemical aspects of compost production.
C05 Biological control - excluding veterinary medicine, but including use of microorganisms, predators and natural products.
C06 Biotechnology - including plant genetics and veterinary vaccines.
C07 Apparatus, formulation, general. including veterinary syringes, general formulations where the active compound is not central to the invention (eg wettable powders) and analysis.