Patent US4498782A successfully refreshed from Google Patents.
US4498782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Assembly for determining light transmissiveness of a fluid
Assignee: SCIENCE RESEARCH CENTER Inc A CORP OF TX
•
Filing: 1981-05-29
•
Granted: 1985-02-12
•
Expires: 2001-05-29
Abstract
Abstract The disclosure is of an assembly for determining light transmissiveness of a fluid. The assembly comprises a light source, means of holding the fluid in a light-shielded path of the light generated and a means for receiving and measuring the attenuated light passed through the fluid sample. The assembly is simple and highly portable. As such it is convenient for use with little training in places such as a physician's office, for measuring substances in immunoassay reaction mixtures.
Inventors
- 👤 David R. Proctor
- 👤 Terry L. Foster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:40
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/251; G01N21/253; G01N2201/00; G01N2201/04; G01N2201/0446; G01N2201/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
An assembly for determining the light transmissiveness of a fluid contained in a light-transparent well of a microtiter plate, wherein there are a plurality of wells in the microtiter plate, which comprises:
Claim 2
Dependent Claim
32 words
An assembly for determining the light transmissiveness of a fluid contained in a light-transparent well of a microtiter plate, wherein there are a plurality of wells in the microtiter plate, which comprises:
Claim 3
Dependent Claim
210 words
a light reception component, which comprises: (a) a light-shield adapted by size and configuration to receive the multiple well portion of the microtiter plate and the light-shield receives each well; (b) a plurality of apertures in the light-shield, each aperture having an entry and an exit into one of each wells; (c) a plurality of light-conducting means, each having a first and second end, the first end being associated with an exit of one of said apertures whereby light passing out of each exit is separately received and conducted to the second end of each of said means; (d) a photo-detector cell mounted to receive light from the second ends of each light-conducting means and to generate an electrical signal proportional to the light intensity; and (e) means in electrical connection with the photo-detector cell for receiving and converting the signal to visually observable indicia; and 2. a light transmission component, which comprises; (a) a light source; (b) a housing for the light source; and (c) an aperture in the housing, for passage of light out of the housing; said light transmission component being adapted to pass light separately through each well of a microtiter plate shielded by said light-shield, and separately into each entry of each aperture 1. (b).
Claim 4
Dependent Claim
210 words
a light reception component, which comprises: (a) a light-shield adapted by size and configuration to receive the multiple well portion of the microtiter plate and the light-shield receives each well; (b) a plurality of apertures in the light-shield, each aperture having an entry and an exit into one of each wells; (c) a plurality of light-conducting means, each having a first and second end, the first end being associated with an exit of one of said apertures whereby light passing out of each exit is separately received and conducted to the second end of each of said means; (d) a photo-detector cell mounted to receive light from the second ends of each light-conducting means and to generate an electrical signal proportional to the light intensity; and (e) means in electrical connection with the photo-detector cell for receiving and converting the signal to visually observable indicia; and 2. a light transmission component, which comprises; (a) a light source; (b) a housing for the light source; and (c) an aperture in the housing, for passage of light out of the housing; said light transmission component being adapted to pass light separately through each well of a microtiter plate shielded by said light-shield, and separately into each entry of each aperture 1. (b).
Claim 5
Dependent Claim
15 words
The assembly of claim 1 wherein the light-conducting means 1. (c) comprises a fiber optic.
Claim 6
Dependent Claim
14 words
The assembly of claim 2 which further comprises an amplifier for amplifying said signal.
Claim 7
Dependent Claim
15 words
The assembly of claim 2 which further comprises a housing for holding the components (1.).
Claim 8
Dependent Claim
20 words
The assembly of claim 2 wherein said means for converting the signal to visually observable indicia comprises an analog readout.
Claim 9
Dependent Claim
11 words
The assembly of claim 2 which is hand holdable and portable.
References Cited (Backward Citations)
US3773426A
Cited
US3847482A
Cited
US4037972A
Cited
US4004150A
Cited
US4115010A
Cited
DE2729684A1
Cited
US4171909A
Cited
US4240751A
Cited
US4310249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |