US3090672A
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Method of determining the content of deuterium hydride in hydrogen
Assignee: Linde GmbH
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Filing: 1959-12-07
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Granted: 1963-05-21
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Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 Grotthuss Elisabeth Von
- 👤 Sohler Sibylle
- 👤 Jaeger Karl
- 👤 Karwat Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:39
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/18; G01N27/00; G01N27/02; G01N27/04; G01N27/14; G01N27/18; Y; Y10; Y10T; Y10T436/00; Y10T436/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
METHOD OF DETERMINED THE CONTENT OF HD, IN ADDITION TO PARA-HYDROGEN, IN A HYDROGEN SAMPLE BY MEASURING THERMAL CONDUCTIVITY, WHICH COMPRISES ADAPTING THE CONCENTRATION RATIO OF ORTHO-TO PARA-HYDROGEN IN SAID SAMPLE TO EQUILIBRIUM AT THE TEMPERATURE OF THE THERMAL CONDUCTIVITY MEASURING MEANS BY PASSING THE HYDROGEN SAMPLE OVER AN ORTHO-PARA EQUILIBRIUM-ESTABLISHING CATALYST SUBSTANCE AT SUBSTANTIALLY ROOM TEMPERATURE, AND THEN COMPARING THE THERMAL CONDUCTIVITY OF SAID HYDROGEN SAMPLE WITH THE THERMAL CONDUCTIVITY OF A REFERENCE STREAM OF PURE HYDROGEN HAVING AN EXACTLY DEFINED HD CONCENTRATION, SAID CONCENTRATION INCLUDING THE VALUE ZERO, THE CONCENTRATION RATIO OF ORTHO-TO PARA-HYDROGEN OF WHICH REFERENCE STREAM OF PURE HYDROGEN HAS ALSO BEEN ADAPTED TO EQUILIBRIUM AT THE TEMPERATURE OF THE THERMAL CONDUCTIVITY MEASURING MEANS IN THE MANNER DESCRIBED ABOVE.
Claim 2
Dependent Claim
123 words
METHOD OF DETERMINED THE CONTENT OF HD, IN ADDITION TO PARA-HYDROGEN, IN A HYDROGEN SAMPLE BY MEASURING THERMAL CONDUCTIVITY, WHICH COMPRISES ADAPTING THE CONCENTRATION RATIO OF ORTHO-TO PARA-HYDROGEN IN SAID SAMPLE TO EQUILIBRIUM AT THE TEMPERATURE OF THE THERMAL CONDUCTIVITY MEASURING MEANS BY PASSING THE HYDROGEN SAMPLE OVER AN ORTHO-PARA EQUILIBRIUM-ESTABLISHING CATALYST SUBSTANCE AT SUBSTANTIALLY ROOM TEMPERATURE, AND THEN COMPARING THE THERMAL CONDUCTIVITY OF SAID HYDROGEN SAMPLE WITH THE THERMAL CONDUCTIVITY OF A REFERENCE STREAM OF PURE HYDROGEN HAVING AN EXACTLY DEFINED HD CONCENTRATION, SAID CONCENTRATION INCLUDING THE VALUE ZERO, THE CONCENTRATION RATIO OF ORTHO-TO PARA-HYDROGEN OF WHICH REFERENCE STREAM OF PURE HYDROGEN HAS ALSO BEEN ADAPTED TO EQUILIBRIUM AT THE TEMPERATURE OF THE THERMAL CONDUCTIVITY MEASURING MEANS IN THE MANNER DESCRIBED ABOVE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-20 | 1966-11-19 | 1967-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-20 | 1970-11-19 | 1971-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-20 | 1974-11-19 | 1975-05-21 | $7700.00 | Window Closed / Lapsed |