Separate type medical material
US7807657B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2008 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Feb 7, 2028 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2400/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A separate type medical material containing a hyaluronic acid ester derivative, which satisfies the storage stability of a hyaluronic acid ester derivative and avoidance of irritation and pain at the time of injecting a therapeutic agent for joints, is provided. A separate type medical material comprising liquid (A) which is an aqueous solution containing a hyaluronic acid ester derivative and buffered to a pH of from 4.5 to 6.5, and liquid (B) which is an aqueous solution having such a buffering power that when it is mixed with the liquid (A), the mixed liquid has a pH within a range of from 6.8 to 7.8, kept separately from each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.