US3902808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for spectroscopic measurements of gas composition after addition of helium
Assignee: Individual
•
Filing: 1974-07-12
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Granted: 1975-09-02
•
Expires: 1994-07-12
Abstract
Abstract A device for spectroscopic measurement of a gas composition wherein a helium resonance lamp includes a window partially transparent to radiation at 584A which is emitted by said lamp, the window being within a chamber. The gas to be sampled is mixed with He and placed in the chamber and the lamp is excited. Spectral radiation from the chamber is viewed and analyzed through an observation window.
Inventors
- 👤 Robert A Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:40
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/66; G01N21/69
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
A device for spectroscopic measurement of a gas composition comprising a helium resonance lamp having an emission at 584A; a window in said lamp partially transparent to radiation at 584A; a chamber surrounding said window; an observation window in said chamber for viewing said window; means for supplying a gas cOntaining helium and at least one constituent to said chamber; and analyzer means adjacent said observation window and exterior of said chamber for viewing the spectral radiation from said chamber through said observation window.
Claim 2
Independent Claim
84 words
A device for spectroscopic measurement of a gas composition comprising a helium resonance lamp having an emission at 584A; a window in said lamp partially transparent to radiation at 584A; a chamber surrounding said window; an observation window in said chamber for viewing said window; means for supplying a gas cOntaining helium and at least one constituent to said chamber; and analyzer means adjacent said observation window and exterior of said chamber for viewing the spectral radiation from said chamber through said observation window.
Claim 3
Dependent Claim
13 words
The device of claim 1 wherein said window in said lamp is aluminum.
Claim 4
Dependent Claim
33 words
The device of claim 2 wherein said emission from said lamp is absorbed by the helium in the gas mixture and causes excitation of the constituent in a thin film adjacent said window.
References Cited (Backward Citations)
US3805077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |