Microparticle and pharmaceutical composition thereof
US8431161B2 · kind B2 · utility
2Cited by
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22Claims
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Key dates
| Filing date | Feb 20, 2009 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Apr 2, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P43/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A microparticle includes an agglomerate of a hydrophilic active substance containing particle, which particle includes an amphiphilic polymer composed of a hydrophobic segment of poly(hydroxy acid) and a hydrophilic segment of polysaccharides or polyethylene glycol, and a hydrophilic active substance. It is characterized by an efficient inclusion of the hydrophilic active substance, and a release of the hydrophilic active substance at an appropriate speed in the human body, and is hence very useful as a DDS pharmaceutical preparation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.