Method for preparing microparticles having a selected polymer molecular weight
US6264987A · kind A · utility
33Cited by
1References
50Claims
0Family size
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Key dates
| Filing date | May 19, 2000 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | May 19, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J13/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for preparing microparticles having a selected polymer molecular weight. The hold time and temperature of a solution containing a nucleophilic compound and a polymer having a starting molecular weight are controlled in order to control the molecular weight of the polymer in the finished microparticle product. In this manner, a selected polymer molecular weight in the finished microparticle product can be achieved from a variety of starting material molecular weights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.