Method of making porous microspheres with geometric standard deviation of 1.25 or less
US7449505B2 · kind B2 · utility
1Cited by
8References
10Claims
0Family size
Assignee
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Key dates
| Filing date | May 20, 2005 |
| Grant date | Nov 11, 2008 |
| Priority date | — |
| Expiry date | Feb 6, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2991
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Porous polymer microspheres having a size of from about 3 to about 50 microns and a geometric standard deviation of about 1.25 or less are disclosed. The porous polymer microspheres are made by a method including the steps of preparing an emulsion comprised of polymer particles having an average particle size of less than about 3 microns and a diluent, subjecting the emulsion to an aggregating condition to form aggregated polymer particles, optionally coalescing the aggregated polymer particles, and removing the diluent to form the porous polymer microspheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.