US4605305A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser nephelometer for sensing antigens and antibodies characterized in having measuring cell comprised of capiliary tube with the diameter of laser beam
Assignee: Centre National de la Recherche Scientifique
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Filing: 1983-06-30
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Granted: 1986-08-12
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Expires: 2003-06-30
Abstract
Abstract A perfected laser nephelometer, characterized in that the measuring cell is comprised of a capillary tube (3) of which the inner diameter is close to the diameter of the laser beam (2).
Inventors
- 👤 Jeannine Lenoir
- 👤 Andre G. Bertoye
- 👤 Renee Bertoye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:28
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/01; G01N21/03; G01N2021/0346
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
125 words
A laser nephelometer for detecting antigens and antibodies, comprising: a laser source for emitting a laser beam; a cell consisting of a capiliary tube containing a solution of said antigens and a solution of said antibodies to be detected, said laser beam being directed toward said cell and being scattered by said cell; a photoelectric sensor to collect the scattered light of said laser beam; processing means to process the information received by the sensor; wherein the inner diameter of the capiliary tube is approximately equal to the diameter of the laser beam, and wherein the laser beam is directed perpendicular to the capiliary tube and falls in the vicinity of an interface separation zone between the antigen solution and antibody solution to be detected.
Claim 2
Dependent Claim
125 words
A laser nephelometer for detecting antigens and antibodies, comprising: a laser source for emitting a laser beam; a cell consisting of a capiliary tube containing a solution of said antigens and a solution of said antibodies to be detected, said laser beam being directed toward said cell and being scattered by said cell; a photoelectric sensor to collect the scattered light of said laser beam; processing means to process the information received by the sensor; wherein the inner diameter of the capiliary tube is approximately equal to the diameter of the laser beam, and wherein the laser beam is directed perpendicular to the capiliary tube and falls in the vicinity of an interface separation zone between the antigen solution and antibody solution to be detected.
Claim 3
Dependent Claim
24 words
A nephelometer as recited in claim 1, wherein the capiliary tube is a cylindrical straight tube with an inner diameter of approximately one millimeter.
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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) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |