Patent US5356819A successfully refreshed from Google Patents.
US5356819A
Expired / Lapsed
US
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Method of determining chemical and/or physical properties of a gaseous atmosphere
Assignee: Individual
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Filing: 1992-02-27
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Granted: 1994-10-18
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Expires: 2012-02-27
Abstract
Abstract A method of determining at least one of chemical properties, physical properties and physical states of a gas atmosphere, including the steps of (a) bringing the gas atmosphere into contact with a heatable surface while heating up the heatable surface from a starting temperature to a predetermined higher temperature by the addition of energy thereto over a period of heating time; (b) discontinuing the addition of energy when the predetermined higher temperature is reached; and (c) evaluating heat discharged by the heatable surface under the influence of the gas atmosphere as a function of time to generate a measuring signal. Heating up of the heatable surface by the addition of energy is preferably effected over a period of heating time which is a limited period of heating time, and occurs cyclically at successive intervals in time as a heating cycle.
Inventors
- 👤 Manfred Ritschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:01
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/18
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
A method of determining at least one of chemical properties, physical properties and physical states of a gas atmosphere, comprising the steps of: a. bringing the gas atmosphere into contact with a heatable surface while heating up the heatable surface from a starting temperature to a predetermined higher temperature by the addition of energy thereto over a period of heating time; b. discontinuing the addition of energy when the predetermined higher temperature is reached; and c. evaluating heat discharged by the heatable surface under the influence of the gas atmosphere as a function of time to generate a measuring signal.
Claim 2
Independent Claim
100 words
A method of determining at least one of chemical properties, physical properties and physical states of a gas atmosphere, comprising the steps of: a. bringing the gas atmosphere into contact with a heatable surface while heating up the heatable surface from a starting temperature to a predetermined higher temperature by the addition of energy thereto over a period of heating time; b. discontinuing the addition of energy when the predetermined higher temperature is reached; and c. evaluating heat discharged by the heatable surface under the influence of the gas atmosphere as a function of time to generate a measuring signal.
Claim 3
Dependent Claim
46 words
The method according to claim 1, wherein heating up of the heatable surface by the addition of energy is effected over a period of heating time which is a limited period of heating time, and occurs cyclically at successive intervals in time as a heating cycle.
Claim 4
Dependent Claim
33 words
The method according to claim 2, wherein, after the addition of energy is discontinued in one period of heating time, the heatable surface is reheated again whenever a predetermined minimum temperature is reached.
Claim 5
Dependent Claim
20 words
The method according to claim 2, wherein the successive intervals in time between each period of heating time are fixed.
Claim 6
Dependent Claim
55 words
The method according to claim 2, wherein the period of heating time has a beginning determined by a given lower measuring value threshold and an end determined by a given upper measuring value threshold, and wherein the succession in time of the period of heating serves as the measuring signal for analyzing the gas atmosphere.
Claim 7
Dependent Claim
28 words
The method according to claim 2, wherein the heat discharged by the heatable surface is evaluated by measuring radiation intensity of thermal radiation emanating from the heatable surface.
Claim 8
Dependent Claim
45 words
The method according to claim 6, wherein the heating cycle begins with heating up of the heatable surface in step (a), and wherein time is measured during which, starting at the beginning of the heating cycle, the radiation intensity reaches a predetermined radiation intensity threshold.
Claim 9
Dependent Claim
51 words
The method according to claim 2, wherein the energy added to heat up the heatable surface is electrical energy, and wherein the heat discharged by the heatable surface under the influence of the gas atmosphere is evaluated by measuring electrical current required to heat the heatable surface at a predetermined voltage.
Claim 10
Dependent Claim
14 words
The method according to claim 2, wherein the measuring signal is an electrical signal.
Claim 11
Dependent Claim
28 words
The method according to claim 1, wherein the heat discharged by the heatable surface is evaluated by measuring radiation intensity of thermal radiation emanating from the heatable surface.
Claim 12
Dependent Claim
45 words
The method according to claim 10, wherein the heating cycle begins with heating up of the heatable surface in step (a), and wherein time is measured during which, starting at the beginning of the heating cycle, the radiation intensity reaches a predetermined radiation intensity threshold.
Claim 13
Dependent Claim
51 words
The method according to claim 1, wherein the energy added to heat up the heatable surface is electrical energy, and wherein the heat discharged by the heatable surface under the influence of the gas atmosphere is evaluated by measuring electrical current required to heat the heatable surface at a predetermined voltage.
Claim 14
Dependent Claim
14 words
The method according to claim 1, wherein the measuring signal is an electrical signal.
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |