Patent US5349816A successfully refreshed from Google Patents.
Patent US3717704A successfully refreshed from Google Patents.
US3717704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inulin type radioactive diagnostic materials
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1970-01-06
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Granted: 1973-02-20
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Expires: 1990-01-06
Abstract
Abstract FOR USE AS A DIAGNOTIC COMPOSITION THERE IS PROVIDED INULIN HAVING A HYDROXYMETHYL GROUP OF WHICH THE CARBON ATOM IS A CARBON-14 ATOM. THIS MATERIAL IS PREPARED FROM INULIN (CARBOXYLIC ACID C-14) BY METHYLATING AND REDUCING.
Inventors
- 👤 J Turner
- 👤 G Sheppard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:01
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/58; G01N33/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |