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US4495418A
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Method of standardizing IR breath alcohol device
Assignee: CAL DETECT Inc A CORP OF
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Filing: 1983-02-15
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Granted: 1985-01-22
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Expires: 2003-02-15
Abstract
Abstract An IR cell for the detection and measurement of breath alcohol is standardized by passing a dry gas carrier containing a known amount of alcohol through an IR cell the walls exposed to the standardizing mixture of which are, as to the alcohol, non-adsorbent.
Inventors
- 👤 Donald G. Hutson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:15
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/27; G01N21/274; G01N21/31; G01N21/35; G01N21/3504; G01N33/00; G01N33/48; G01N33/483; G01N33/497; G01N33/4972
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
The method of standardizing, calibrating or testing apparatus utilizing an IR cell for determining quantitatively the content of alcohol in breath comprising passing a dry gas carrier sample containing a known amount of ethyl alcohol through an IR cell the walls exposed to said sample of which are, as to said alcohol, non-adsorbant.
Claim 2
Independent Claim
53 words
The method of standardizing, calibrating or testing apparatus utilizing an IR cell for determining quantitatively the content of alcohol in breath comprising passing a dry gas carrier sample containing a known amount of ethyl alcohol through an IR cell the walls exposed to said sample of which are, as to said alcohol, non-adsorbant.
Claim 3
Dependent Claim
12 words
The method of claim 1 wherein the dry gas is anhydrous argon.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein the said walls are nickel plated.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the said walls are of stainless steel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |