Patent US4225784A successfully refreshed from Google Patents.
US4225784A
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Covalently bound biological substances to plastic materials and use in radioassay
Assignee: SmithKline Instrument Inc
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Filing: 1976-06-17
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Granted: 1980-09-30
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Expires: 1996-06-17
Abstract
Abstract Covalently bound biological substances to plastic materials whose inside surfaces have been coated with glutaraldehyde, with or without prior treatment with an aliphatic amine or diamine, useful in radioimmunoassay procedures.
Inventors
- 👤 M. James Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:00
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/74; G01N33/78; G01N33/53; G01N33/543; G01N33/544; G01N33/545; G01N33/82; Y; Y10; Y10S; Y10S436/00; Y10S436/807; Y10S436/808; Y10S436/81
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
34 words
A method for indirectly determining the level of thyroid hormone in a biological fluid which comprises detecting the degree of unsaturation of thyrobinding globulin in said biological fluid by employing immobilized hormone specific protein.
Claim 2
Independent Claim
34 words
A method for indirectly determining the level of thyroid hormone in a biological fluid which comprises detecting the degree of unsaturation of thyrobinding globulin in said biological fluid by employing immobilized hormone specific protein.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the hormone specific protein is anti-triiodothyronine gamma globulin.
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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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |