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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9/00
Medicinal preparations characterised by special physical form
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A61K9/48
Preparations in capsules, e.g. of gelatin, of chocolate
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A61K9/50
Microcapsules; having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
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A61K9/5005
Wall or coating material
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A61K9/5021
Organic macromolecular compounds
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A61K9/5036
Polysaccharides, e.g. gums, alginate; Cyclodextrin
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A61K9/5042
Cellulose; Cellulose derivatives, e.g. phthalate or acetate succinate esters of hydroxypropyl methylcellulose
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A61K9/5047
Cellulose ethers containing no ester groups, e.g. hydroxypropyl methylcellulose
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