Adsorbent for oral administration
US8309130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2009 |
| Grant date | Nov 13, 2012 |
| Priority date | — |
| Expiry date | Mar 11, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61P31/12
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An adsorbent for oral administration, characterized by comprising a spherical activated carbon, wherein a diameter is 0.01 to 1 mm, a specific surface area determined by Langmuir's adsorption equation is 1000 m2/g or more, and a diffraction intensity ratio, an R value, determined by an equation (1):R=(I15−I35)/(I24−I35) (1)wherein I15 is a diffraction intensity when a diffraction angle (2θ) of an X-ray diffractometry is 15°, I35 is a diffraction intensity when a diffraction angle (2θ) of an X-ray diffractometry is 35°, and I24 is a diffraction intensity when a diffraction angle (2θ) of an X-ray diffractometry is 24°, is 1.4 or more; and an adsorbent for an oral administration, characterized by comprising a surface-modified spherical activated carbon, wherein a diameter is 0.01 to 1 mm, a specific surface area determined by Langmuir's adsorption equation is 1000 m2/g or more, a total amount of acidic groups is 0.40 to 1.00 meq/g, a total amount of basic groups is 0.40 to 1.10 meq/g, and a diffraction intensity ratio, an R value, determined by equation (1) is 1.4 or more. The adsorbents for oral administration exhibit a useful selective adsorbability, that is, a less adsorbability o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.