Patent US5167927A successfully refreshed from Google Patents.
US5167927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monitor for ozone, hydrogen peroxide and other gases in fluids
Assignee: Ozone Sterilization Products Inc
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Filing: 1989-10-31
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Granted: 1992-12-01
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Expires: 2009-10-31
Abstract
Abstract This monitoring invention is an improvement over the ozone (O 3 ) and hydrogen peroxide (H 2 O 2 ) monitoring systems that are now commercially used. The manner in which this monitor measures the gas, or a gas dissolved in a liquid, is by measuring the heat energy that is released when the material to be measured is catalyzed. The detector measures the heat produced when, for example, ozone is reduced to oxygen or the hydrogen peroxide is reduced to oxygen and water by a catalytic action. This heat energy is collected and measured. The higher the temperature, the higher the concentration.
Inventors
- 👤 Eskil L. Karlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:13
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0027; G01N33/0036; G01N33/0039; G01N25/00; G01N25/20; G01N25/22; G01N25/28; G01N25/30; G01N25/32; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
128 words
A gas monitoring apparatus for measuring ozone or hydrogen peroxide concentration in a gas comprising means for directing a stream of said gas against matched thermally conducting plates on opposite sides of the axis of said stream and extending upstream at an acute angle to said axis, one plate carrying on its upstream side a coating including a catalyst for ozone or hydrogen peroxide and the other plate carrying on its upstream face a second coating equal to the first plate's, weight and thermal properties, but without the catalyst, and sensing means on the downstream side of each said plates for measuring the temperature of its plate and means for indicating the difference between said temperatures to indicate the concentration of ozone or hydrogen peroxide in said gas.
Claim 2
Dependent Claim
128 words
A gas monitoring apparatus for measuring ozone or hydrogen peroxide concentration in a gas comprising means for directing a stream of said gas against matched thermally conducting plates on opposite sides of the axis of said stream and extending upstream at an acute angle to said axis, one plate carrying on its upstream side a coating including a catalyst for ozone or hydrogen peroxide and the other plate carrying on its upstream face a second coating equal to the first plate's, weight and thermal properties, but without the catalyst, and sensing means on the downstream side of each said plates for measuring the temperature of its plate and means for indicating the difference between said temperatures to indicate the concentration of ozone or hydrogen peroxide in said gas.
Claim 3
Dependent Claim
24 words
The apparatus of claim 1 further comprising a heat sink on the downstream side of said plates for equilizing the temperatures of said plates.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 plus insulation between said plates and said heat sink for varying the response time of the temperature indicators.
Claim 5
Dependent Claim
27 words
The apparatus of claim 1 in which the means for directing the gas against the plates comprises a nozzle directed toward the upstream side of said plates.
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) | 1995-12-01 | 1996-06-01 | 1996-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-01 | 2000-06-01 | 2000-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-01 | 2004-06-01 | 2004-12-01 | $7700.00 | Window Closed / Lapsed |