US3849546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for obtaining abtigenlipoid emulsions
Assignee: Institut National de la Santé et de la Recherche Médicale
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Filing: 1972-02-23
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Granted: 1974-11-19
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Expires: 1992-02-23
Abstract
Abstract 1. IN THE PROCESS OF PREPARING A LIPOID EMULSION CONTAINING AN ANTIGEN FOR IMMUNOCHEMICAL DETERMINATIONS, THE SAID PROCESS COMPRISING FORMING SAID ANTIGEN-CONTAINING EMULSION IN A NEUTRAL OIL, WHICH IS LIQUID AT AMBIENT TEMPERATURE, AND SUBJECTING THE SAME TO ULTRASOUNDS, THE IMPROVEMENT COMPRISING WASHING SAID EMULSION WITH PHYSIOLOGICAL SALINE SOLUTION OR PHOSPHATE BUFFER SOLUTION HAVING A PH OF 7.3 WITH SUCCESSIVE WASHING CENTRIFUGATIONS AND SEPARATIONS WHEREBY A STABLE ANTIGEN-EMULSION IS RECOVERED FREE OF SEPARATE PARTICLES OF SAID ANTIGEN.
Inventors
- 👤 J Beaumont
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:18
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/92; G01N2800/00; G01N2800/04; G01N2800/044
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
IN THE PROCESS OF PREPARING A LIPOID EMULSION CONTAINING AN ANTIGEN FOR IMMUNOCHEMICAL DETERMINATIONS, THE SAID PROCESS COMPRISING FORMING SAID ANTIGEN-CONTAINING EMULSION IN A NEUTRAL OIL, WHICH IS LIQUID AT AMBIENT TEMPERATURE, AND SUBJECTING THE SAME TO ULTRASOUNDS, THE IMPROVEMENT COMPRISING WASHING SAID EMULSION WITH PHYSIOLOGICAL SALINE SOLUTION OR PHOSPHATE BUFFER SOLUTION HAVING A PH OF 7.3 WITH SUCCESSIVE WASHING CENTRIFUGATIONS AND SEPARATIONS WHEREBY A STABLE ANTIGEN-EMULSION IS RECOVERED FREE OF SEPARATE PARTICLES OF SAID ANTIGEN.
Claim 2
Dependent Claim
76 words
IN THE PROCESS OF PREPARING A LIPOID EMULSION CONTAINING AN ANTIGEN FOR IMMUNOCHEMICAL DETERMINATIONS, THE SAID PROCESS COMPRISING FORMING SAID ANTIGEN-CONTAINING EMULSION IN A NEUTRAL OIL, WHICH IS LIQUID AT AMBIENT TEMPERATURE, AND SUBJECTING THE SAME TO ULTRASOUNDS, THE IMPROVEMENT COMPRISING WASHING SAID EMULSION WITH PHYSIOLOGICAL SALINE SOLUTION OR PHOSPHATE BUFFER SOLUTION HAVING A PH OF 7.3 WITH SUCCESSIVE WASHING CENTRIFUGATIONS AND SEPARATIONS WHEREBY A STABLE ANTIGEN-EMULSION IS RECOVERED FREE OF SEPARATE PARTICLES OF SAID ANTIGEN.
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |