US3658982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable latex reagent for the detection of rheumatoid arthritis
Assignee: Ortho Pharmaceutical Corp
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Filing: 1969-05-13
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Granted: 1972-04-25
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Expires: 1989-05-13
Abstract
Abstract A STABLE REAGENT HAVING AVIDITY FOR THE AGGLUTINATION REACTION IN THE SEROLOGICAL DETERMINATION OF RHEUMATOID FACTORS IS COMPOSED OF RABBIT GAMMA GLOBULIN WHICH IS DEGRADED WITH A PROTEOLYTIC ENZYME, COATED ON LATEX PARTICLES, HEAT TREATED AND STORED AT LOW TEMPERATURES UNTIL USED. THIS REAGENT IS CAPABLE OF IDENTIFYING TRUE POSITIVES WHEN THE SODIUM CHLORIDE OF THE SERUM DILUENT IS MAINTAINED WITHIN CERTAIN CRITICAL LIMITS.
Inventors
- 👤 Alice M Reiss
- 👤 Rosemary K Chachowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:02
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/564; G01N2800/00; G01N2800/10; G01N2800/101; G01N2800/102; Y; Y10; Y10S; Y10S530/00; Y10S530/81; Y10S530/812; Y10S530/815; Y10S530/866; Y10S530/868
Claims Analysis
Total Claims: 0
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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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |