US3849654A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescence cuvette
Assignee: Individual
•
Filing: 1973-10-19
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Granted: 1974-11-19
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Expires: 1993-10-19
Abstract
Abstract A fluorimeter cuvette is constructed with internal reflective surfaces such that the measured fluorescent radiation passing to the photodetector travels in the same direction as the direction of the exciting radiation entering the cuvette. As a result, fluorimetry measurements can be made in standard spectrophotometry equipment. The cuvette is also useful for nephelometry measurements.
Inventors
- 👤 H Malvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:17
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/47; G01N21/49; G01N21/51; G01N21/01; G01N21/03; G01N21/0303; G01N21/05; G01N21/62; G01N21/63; G01N21/64; G01N21/645; G01N2021/0389; G01N2021/6482
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A cuvette comprising a cavity for receiving a fluid sample to be activated by incoming incident radiation, said cavity defined by confronting rearward and forward end walls spaced from each other in the direction of the incoming incident radiation and side walls therebetween, the rearward end wall being entirely opaque to incoming incident radiation and the forward wall being transparent to radiation scattered or emitted by said fluid sample, reflective surface means located external to and in fixed relationship to said cavity for reflecting said radiation at a 90* angle relative to the direction of the incoming radiation incident on the relecting surface, and means in said cavity for inserting and withdrawing a fluid sample.
Claim 2
Dependent Claim
115 words
A cuvette comprising a cavity for receiving a fluid sample to be activated by incoming incident radiation, said cavity defined by confronting rearward and forward end walls spaced from each other in the direction of the incoming incident radiation and side walls therebetween, the rearward end wall being entirely opaque to incoming incident radiation and the forward wall being transparent to radiation scattered or emitted by said fluid sample, reflective surface means located external to and in fixed relationship to said cavity for reflecting said radiation at a 90* angle relative to the direction of the incoming radiation incident on the relecting surface, and means in said cavity for inserting and withdrawing a fluid sample.
Claim 3
Dependent Claim
29 words
The cuvette of claim 1 wherein the inner surface of the opaque rearward end wall of the cavity is reflective to radiation scattered or emitted by said fluid sample.
Claim 4
Dependent Claim
30 words
The cuvette of claim 1 wherein said cavity has a fluid inlet, and a fluid outlet spaced from said fluid inlet to allow continuous flow of fluid through said cavity.
Claim 5
Independent Claim
78 words
A method of measuring the light generating or light scattering properties of a fluid sample comprising passing incoming radiation prior to passing through the sample to a reflective surface situated to reflect the radiation at a 90* angle relative to the direction of the incoming radiation incident on the reflective surface, passing the reflected radiation through the fluid sample, and measuring the intensity of radiation emitted from the sample along an axis parallel to the incoming exciting radiation.
Claim 6
Independent Claim
78 words
A method of measuring the light generating or light scattering properties of a fluid sample comprising passing incoming radiation prior to passing through the sample to a reflective surface situated to reflect the radiation at a 90* angle relative to the direction of the incoming radiation incident on the reflective surface, passing the reflected radiation through the fluid sample, and measuring the intensity of radiation emitted from the sample along an axis parallel to the incoming exciting radiation.
Claim 7
Dependent Claim
38 words
The method of claim 4 wherein the exciting radiation which has passed through the fluid sample is reflected and passed back through the sample parallel to the direction of first passage of the exciting radiation through the sample.
Claim 8
Dependent Claim
23 words
The method of claim 4 wherein the radiation emitted from the sample is fluorescent radiation having a wavelength different from the incoming radiation.
References Cited (Backward Citations)
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US2779230A
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US3469920A
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US3761715A
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US3769516A
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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) | 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 |