Patent US3847546A successfully refreshed from Google Patents.
US3847546A
Expired / Lapsed
US
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Method and system for thermal analysis
Assignee: Chromalytics Corp
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Filing: 1972-10-04
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Granted: 1974-11-12
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Expires: 1992-10-04
Abstract
Abstract A temperature programmed solid sample chamber adapted to apply thermal energy to a sample material. A carrier gas is flowed through the chamber whose temperature is raised at a programmed relatively slow rate to limit the thermal energy applied to the sample and thereby reduce the production of secondary decomposition products of the material under analysis. The effluent gases containing the decomposition products are swept through a first detector and thence through a first valve to vent. The valve is adjustable so that these effluent gases when desired may be stored in a cold trap. The stored gases are released from the trap by heating and reversing carrier gas flow through the trap and then passing the stored gases as a slug sample onto a chromatographic separating column for separation into their constituent components. The constituent components of the stored gases are then passed through a second detector. By recording the response of the two detectors, much information about the character and properties of the original material may be obtained.
Inventors
- 👤 D Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:52
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/12; G01N31/00; G01N31/12; G01N2030/121; G01N2030/125; G01N2030/126; G01N2030/128; G01N30/62; G01N30/64; G01N30/66
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
122 words
A SYSTEM FOR THE THERMAL ANALYSIS OF MATERIALS COMPRISING: THERNAL MEANS FOR SUBJECTING SAID MATERIALS TO HEAT THEREBY TO PRODUCE EFFLUENT GASES, FIRST DETECTOR MEANS COUPLED TO SAID THERMAL MEANS FOR MEASURING A PROPERTY OF SAID EFFLUENT GASES, TRAP MEANS COUPLED TO SAID FIRST DETECTOR MEANS FOR STORING SAID EFFLUENT GASES, FIRST CARRIER GAS MEANS COUPLED TO SAID THERMAL MEANS FOR SELECTIVELY PASSING SAID EFFLUENT GASES FROM SAID THERMAL MEANS THROUGH SAID FIRST DETECTOR MEANS TO SAID TRAP MEANS, COLUMN MEANS COUPLED TO SAID TRAP MEANS FOR SEPARATING SAID STORED GASES INTO THEIR CONSTITUENT COMPONENTS, SECOND DETECTOR MEANS COUPLED TO SAID COLUMN MEANS FOR MEASURING A PROPERTY OF SAID CONSTITUENT COMPONENTS, AND ADDITIONAL CARRIER GAS MEANS COUPLED TO SAID TRAP MEANS FOR
Claim 2
Independent Claim
122 words
A SYSTEM FOR THE THERMAL ANALYSIS OF MATERIALS COMPRISING: THERNAL MEANS FOR SUBJECTING SAID MATERIALS TO HEAT THEREBY TO PRODUCE EFFLUENT GASES, FIRST DETECTOR MEANS COUPLED TO SAID THERMAL MEANS FOR MEASURING A PROPERTY OF SAID EFFLUENT GASES, TRAP MEANS COUPLED TO SAID FIRST DETECTOR MEANS FOR STORING SAID EFFLUENT GASES, FIRST CARRIER GAS MEANS COUPLED TO SAID THERMAL MEANS FOR SELECTIVELY PASSING SAID EFFLUENT GASES FROM SAID THERMAL MEANS THROUGH SAID FIRST DETECTOR MEANS TO SAID TRAP MEANS, COLUMN MEANS COUPLED TO SAID TRAP MEANS FOR SEPARATING SAID STORED GASES INTO THEIR CONSTITUENT COMPONENTS, SECOND DETECTOR MEANS COUPLED TO SAID COLUMN MEANS FOR MEASURING A PROPERTY OF SAID CONSTITUENT COMPONENTS, AND ADDITIONAL CARRIER GAS MEANS COUPLED TO SAID TRAP MEANS FOR
Claim 3
Dependent Claim
47 words
A system according to claim 1 which also includes temperature control means connected to said thermal means for varying the temperature of said materials as a function of time, thereby to limit the thermal energy applied to said materials to reduce the production of secondary decomposition products.
Claim 4
Dependent Claim
51 words
A system according to claim 1 which also includes: additional thermal means for applying heat to said column means, and temperature control means coupled to said additional thermal means for varying the temperature of said column means as a function of time, thereby to facilitate the separation of said stored gases.
Claim 5
Dependent Claim
31 words
A system according to claim 1 wherein said trap means includes heater means for heating said trap means, thereby to intermittently release said stored gases for passage to said column means.
Claim 6
Dependent Claim
40 words
A system according to claim 1 wherein said thermal means includes a sample chamber for holding samples of said materials and exposing said materials to a flow of a carrier gas from said first carrier gas means while being heated.
Claim 7
Dependent Claim
95 words
A system according to claim 1 which also includes: temperature control means connected to said thermal means for varying the temperature of said materials as a function of time thereby to limit the thermal energy applied to said materials to reduce the production of secondary decomposition products, and first valve means connected to said additional carrier gas means, said column means, and said trap means for selectively passing said effluent gases to said trap means and said stored effluent gases to said column means, said first valve means being a two position, six port valve.
Claim 8
Dependent Claim
122 words
A system according to claim 1 which also includes: temperature control means connected to said thermal means for varying the temperature of said materials as a function of time, thereby to limit the thermal energy applied to said materials to reduce the production of secondary decomposition products, ADDITIONAL thermal means for applying heat to said column means, temperature control means coupled to said additional thermal means for varying the temperature of said column means as a function of time, a further carrier gas means for transporting fluid samples, and second valve means connected to said thermal means, said first detector means, and said further carrier gas means for selectively passing said fluid samples and said effluent gases to said first detector means.
Claim 9
Dependent Claim
43 words
A system according to claim 1 which includes first valve means connected to said additional carrier gas means, said column means, and said trap means for selectively passing said effluent gases to said trap means and said stored constituents to said column means.
Claim 10
Dependent Claim
18 words
A system according to claim 8 wherein said first valve means is a two position, six port valve.
Claim 11
Dependent Claim
64 words
A system according to claim 1 which also includes: a further carrier gas means selectively coupled to said first detector means for transporting fluid samples to said first detector means, and second valve means connected to said thermal means, said first detector means, and said further carrier gas means for selectively passing said fluid samples and said effluent gases to said first detector means.
Claim 12
Dependent Claim
47 words
A system according to claim 10 which also includes a reactor and third valve means connected to said reactor, said first detector, and said second valve means for selectively passing said effluent gases and said fluid samples through said reactor prior to passage to said first detector.
Claim 13
Independent Claim
80 words
A method for thermally analyzing materials using a trap and separating column comprising the steps of: heating said materials thereby to produce effluent decomposition gases, measuring a property of said effluent gases, passing selected ones of said effluent gases to said trap for storing said selected ones of said effluent gases, intermittently passing at least one of said stored gases through said separating column to separate said stored gases into constituent components, and measuring a property of said constituent components.
Claim 14
Independent Claim
80 words
A method for thermally analyzing materials using a trap and separating column comprising the steps of: heating said materials thereby to produce effluent decomposition gases, measuring a property of said effluent gases, passing selected ones of said effluent gases to said trap for storing said selected ones of said effluent gases, intermittently passing at least one of said stored gases through said separating column to separate said stored gases into constituent components, and measuring a property of said constituent components.
Claim 15
Dependent Claim
20 words
A method according to claim 12 wherein only selected ones of said stored gases are passed through said separating column.
Claim 16
Dependent Claim
42 words
A method according to claim 12 which includes the additional step of varying the heat applied to said material as a function of time thereby to limit the thermal energy applied to said materials to reduce the production of secondary decomposition products.
Claim 17
Dependent Claim
37 words
A method according to claim 14 which includes the additional step of comparing variations in the measured property of said effluent gases as a function of time with variations in the measured property of said constituent components.
Claim 18
Dependent Claim
29 words
A method according to claim 14 which includes the additional step of selecting the effluent gases to be stored in accordance with the measured property of said effluent gases.
Claim 19
Dependent Claim
46 words
A method according to claim 14 which includes the additional steps of: selectively introducing fluid sample materials for measuring a property thereof, selectively chemically reacting said fluid sample materials and said effluent gases thereby to produce reaction gases, and measuring a property of said reaction gases.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |