Patent US3793445A successfully refreshed from Google Patents.
US3793445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reagent for radioimmunoassay
Assignee: Wisconsin Alumni Research Foundation
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Filing: 1970-04-29
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Granted: 1974-02-19
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Expires: 1990-04-29
Abstract
Abstract A WETTABLE POLYMER GEL CONTAINING AT LEAST ONE BINDING PROTEIN PHYSICALLY AND ESSENTIALLY PERMANENTLY TRAPPED IN THE GEL MATRIX, THE GEL HAVING A PORE SIZE WHICH WILL ESSENTIALLY PREVENT THE DIFFUSION OF THE BINDING PROTEIN THROUGH THE GEL BUT WILL NOT PREVENT THE DIFFUSION OF SMALLER MOLECULES TO THE SITES OF THE BINDING PROTEIN WITHIN THE GEL MATRIX. THE GEL IS PREPARED BY POLYMERZING THE GEL MONOMER WHILE ADMIXED WITH ANTISERUM. IT IS USEFUL IN ASSAYING FOR ANTIGENS OR HAPTENES.
Inventors
- 👤 S Updike
- 👤 T Goodfriend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:18
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/544; G01N33/549; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/56; Y; Y10; Y10S; Y10S436/00; Y10S436/804; Y10S436/815; Y10S436/817
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |