US4497744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gentisic acid salts as radiographic scanning agent stabilizers
Assignee: Mallinckrodt Inc
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Filing: 1980-11-03
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Granted: 1985-02-05
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Expires: 2000-11-03
Abstract
Abstract Stable compositions, useful as technetium-99m-based scintigraphic agents, comprise gentisic acid or a pharmaceutically-acceptable salt or ester thereof in combination with a pertechnetate reducing agent or dissolved in pertechnetate-99m (99mTcO4-) solution. The compositions are especially useful in combination with a phosphate or phosphonate material which carries the radionuclide to bone, thus providing a skeletal imaging agent.
Inventors
- 👤 Mahdi B. Fawzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:22
CPC Classifications
A; A61; A61K; A61K51/00; A61K51/12; A61K51/02; A61K51/04; A61K51/0489; A61K2123/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
The water-soluble compound stannous gentisate.
Claim 2
Dependent Claim
5 words
The water-soluble compound stannous gentisate.
Claim 3
Dependent Claim
5 words
The water-soluble compound chromous gentisate.
Claim 4
Dependent Claim
5 words
The water-soluble compound chromous gentisate.
References Cited (Backward Citations)
US3673157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |