Method of preparing gas-filled polymer matrix microparticles useful for echographic imaging
US6919068B2 · kind B2 · utility
1Cited by
7References
16Claims
0Family size
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Key dates
| Filing date | May 17, 2002 |
| Grant date | Jul 19, 2005 |
| Priority date | — |
| Expiry date | Jan 7, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J13/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method is provided to prepare gas-filled, porous microparticles having a polymer matrix interior which are useful as ultrasound echogenic contrast agents. An oil-in-water suspension is formed, both phases are frozen, then the aqueous and nonaqueous frozen phases are removed by sublimation. The resulting porous microparticles can receive a gas and be used as an ultrasound contrast agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.