US2591691A
Expired / Lapsed
US
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Method for determining breath alcohol content
Assignee: Individual
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Filing: 1946-07-05
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Granted: 1952-04-08
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Expires: 1966-07-05
Abstract
No abstract record available.
Inventors
- 👤 Glenn C Forrester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:55
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/22; A; A61; A61B; A61B5/00; A61B5/08; A61B5/082; Y; Y10; Y10S; Y10S436/00; Y10S436/90; Y10S436/908; Y10T; Y10T436/00; Y10T436/20; Y10T436/203332; Y10T436/204165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE METHOD OF RAPIDLY ASCERTAINING THE APPROXIMATE DEGREE OF INTOXICATION OF A PERSON WHICH COMPRISES FORCING EXHALED ALVEOLAR AIR OF THE PERSON UNDERGOING TEST AT A FLOW RATE OF AT LEAST 800 CUBIC CENTIMETERS PER MINUTE THROUGH A COLORED ACIDIC SOLUTION OF POTASSIUM PERMANGANATE HAVINTG A POTASSIUM PERMANGANATE CONCENTRATION FALLING WITHIN THE RANGE 0.005 N TO 0.100 N AND A SPECIFIC GRAVITY FALLING WITHIN THE RANG 1.16 TO 1.29, SAID SOLUTION BEING CONTAINED WITHIN THE INTERSTICES OF A POROUS GLASS FRIT, AND MEASURING THE PERIOD OF TIME REQUIRED TO RENDER SAID COLORED ACIDIC SOLUTION COLORLESS, SAID ALCOHOL OF TIME BEING PROPORTIONAL TO THE BLOOD ALCOHOL CONTENT AND DEGREE OF INTOXICATION OF THE PERSON UNDERGOING TEST.
Claim 2
Independent Claim
115 words
THE METHOD OF RAPIDLY ASCERTAINING THE APPROXIMATE DEGREE OF INTOXICATION OF A PERSON WHICH COMPRISES FORCING EXHALED ALVEOLAR AIR OF THE PERSON UNDERGOING TEST AT A FLOW RATE OF AT LEAST 800 CUBIC CENTIMETERS PER MINUTE THROUGH A COLORED ACIDIC SOLUTION OF POTASSIUM PERMANGANATE HAVINTG A POTASSIUM PERMANGANATE CONCENTRATION FALLING WITHIN THE RANGE 0.005 N TO 0.100 N AND A SPECIFIC GRAVITY FALLING WITHIN THE RANG 1.16 TO 1.29, SAID SOLUTION BEING CONTAINED WITHIN THE INTERSTICES OF A POROUS GLASS FRIT, AND MEASURING THE PERIOD OF TIME REQUIRED TO RENDER SAID COLORED ACIDIC SOLUTION COLORLESS, SAID ALCOHOL OF TIME BEING PROPORTIONAL TO THE BLOOD ALCOHOL CONTENT AND DEGREE OF INTOXICATION OF THE PERSON UNDERGOING TEST.
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) | 1955-04-08 | 1955-10-08 | 1956-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-08 | 1959-10-08 | 1960-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-08 | 1963-10-08 | 1964-04-08 | $7700.00 | Window Closed / Lapsed |