Patent classifications
A
HUMAN NECESSITIES
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A61
MEDICAL OR VETERINARY SCIENCE; HYGIENE
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A61K
PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
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2236/00
Isolation or extraction methods of medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicine
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A61K2236/30
Extraction of the material
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A61K2236/33
involving extraction with hydrophilic solvents, e.g. lower alcohols, esters or ketones
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A61K2236/331
using water, e.g. cold water, infusion, tea, steam distillation or decoction
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