Patent US5547656B1 successfully refreshed from Google Patents.
US5547656B1
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Low density microspheres and their use as contrast agents for computed tomography and in other applications
Assignee: ImaRx Therapeutics Inc
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Filing: 1995-05-24
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Granted: 1999-07-20
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Expires: 2015-05-24
Abstract
Abstract The invention provides contrast media for diagnostic imaging comprising a substantially homogeneous aqueous suspension of gas-filled microspheres, wherein the microspheres are filled with a perfluorocarbon gas. The microspheres are preferably formed from biocompatible synthetic polymers or copolymers.
Inventors
- 👤 Evan C Unger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
A; A61; A61K; A61K49/00; A61K49/04; A61K49/0409; A61K49/0414; A61K49/0419; A61P; A61P9/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/31862
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-07-19 | 2003-01-18 | 2003-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-07-19 | 2007-01-18 | 2007-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-07-19 | 2011-01-18 | 2011-07-20 | $7700.00 | Window Closed / Lapsed |