US4099886A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detecting system
Assignee: 3M Co
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Filing: 1976-07-12
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Granted: 1978-07-11
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Expires: 1996-07-12
Abstract
Abstract A method is disclosed for detecting the formation of or presence of light-interacting domains, e.g. particles or clumps of particles, in a supporting medium which comprises: disposing the supporting medium between a source of multipoint ilumination and a scintillation detector, illuminating the supporting medium with a multiplicity of discrete light beams directed through the medium toward the scintillation detector; and causing relative motion between the light beams and the supporting medium. If light-interacting domains of critical size are present in the medium scintillation is detected. A viewer and test card for carrying out the method are also disclosed.
Inventors
- 👤 Robert J. Oliveira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:06
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/82; G01B; G01B15/00; G01B15/02; G01B15/025; G01N21/17; G01N21/25; G01N21/29; Y; Y10; Y10S; Y10S436/00; Y10S436/805
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A test card for preforming immunological tests on the surface thereof comprising a flat substrate which generates a multiplicity of discreet light beams of predetermined size when illuminated by a single light source having deposited thereon at least one dried immunological test reagent.
Claim 2
Dependent Claim
43 words
A test card for preforming immunological tests on the surface thereof comprising a flat substrate which generates a multiplicity of discreet light beams of predetermined size when illuminated by a single light source having deposited thereon at least one dried immunological test reagent.
Claim 3
Dependent Claim
41 words
A test card for performing immunological tests on the surface thereof comprising a flat substrate having a plurality of retroreflective immobilized glass beads on the upper surface thereof and at least one dried immunological test reagent deposited on said upper surface.
Claim 4
Dependent Claim
41 words
A test card for performing immunological tests on the surface thereof comprising a flat substrate having a plurality of retroreflective immobilized glass beads on the upper surface thereof and at least one dried immunological test reagent deposited on said upper surface.
Claim 5
Dependent Claim
29 words
A test card for performing immunological tests on the surface thereof comprising a flat substrate comprising a half tone screen and at least one immunological test reagent deposited thereon.
Claim 6
Dependent Claim
29 words
A test card for performing immunological tests on the surface thereof comprising a flat substrate comprising a half tone screen and at least one immunological test reagent deposited thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |