Patent US4755056A successfully refreshed from Google Patents.
US4755056A
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Instrument for spectroscopy having metal halide lamp as light source
Assignee: Hitachi Ltd
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Filing: 1987-06-19
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Granted: 1988-07-05
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Expires: 2007-06-19
Abstract
Abstract An instrument for spectroscopy according to this invention uses a metal halide lamp, in which at least mercury and dysprosium halide are enclosed, as the light source for the purpose of effecting measurements for a wavelength region extending from the ultraviolet to the visible light with a single light source. This metal halide lamp has a spectre, which is effective in a wavelength region extending from about 200 nm to about 700 nm.
Inventors
- 👤 Makoto Yasuda
- 👤 Tsune Miyashita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:47
CPC Classifications
G; G01; G01J; G01J3/00; G01J3/02; G01J3/10; H; H01; H01J; H01J61/00; H01J61/02; H01J61/12; H01J61/18; H01J61/20; G01J3/28; G01J3/45; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
An instrument for spectroscopy comprising: a light source provided with a metal halide lamp containing mercury and dysprosium halide; spectroscopic means for dispersing light from said light source over a wavelength region extending at least from 220 to 700 nm; detector means for detecting the amount of the light, which has passed through said spectroscopic means; means for signal processing, which treats detected output signals coming from said detector means; and means for locating a sample to be measured in the light path from said light source to said detector means.
Claim 2
Dependent Claim
91 words
An instrument for spectroscopy comprising: a light source provided with a metal halide lamp containing mercury and dysprosium halide; spectroscopic means for dispersing light from said light source over a wavelength region extending at least from 220 to 700 nm; detector means for detecting the amount of the light, which has passed through said spectroscopic means; means for signal processing, which treats detected output signals coming from said detector means; and means for locating a sample to be measured in the light path from said light source to said detector means.
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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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |