Apparatus and method for determining the proportion of a substance in a gas sample using an infrared measuring instrument
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United States of America Patent
Stats
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Sep 11, 2007
Grant Date -
Dec 15, 2005
app pub date -
Jun 1, 2005
filing date -
Jun 11, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an apparatus and a method for improved correction of drift in an infrared measuring instrument. The measurement signal furnished by a thermal detector is split into a direct voltage component and an alternating voltage component. By means of calibration curves (24, 27), a calculated comparison variable ##EQU00001## is formed from a measured, averaged concentration value ##EQU00002## The correction value .DELTA.T for the drift correction is obtained from the difference between the corresponding measured size of the direct voltage component ##EQU00003## and the comparison variable ##EQU00004##
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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DRAGERWERK AKTIENGESELLSCHAFT | MOISLINGER ALLEE 53-55 D-23542 LUBECK |
International Classification(s)

- 2005 Application Filing Year
- H02H Class
- 766 Applications Filed
- 373 Patents Issued To-Date
- 48.70 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Behring, Rasmus | Lubeck, DE | 2 | 12 |
# of filed Patents : 2 Total Citations : 12 | |||
Dicks, Bernd-Michael | Ratekau, DE | 9 | 22 |
# of filed Patents : 9 Total Citations : 22 | |||
Dreyer, Peter | Pansdorf, DE | 21 | 145 |
# of filed Patents : 21 Total Citations : 145 | |||
Hattendorff, Horst-Dieter | Bad Schwartau, DE | 6 | 70 |
# of filed Patents : 6 Total Citations : 70 | |||
Matthiessen, Hans | Bad Schwartau, DE | 30 | 566 |
# of filed Patents : 30 Total Citations : 566 |
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Patent Citation Ranking
- 0 Citation Count
- H02H Class
- 0 % this patent is cited more than
- 18 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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