US3065060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal analysis apparatus
Assignee: National Research Corp
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Filing: 1958-03-05
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Granted: 1962-11-20
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Expires: 1978-03-05
Abstract
No abstract record available.
Inventors
- 👤 Jonathan R Roehrig
- 👤 Jr John C Simons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:36
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N33/00; G01N33/20; G01N33/202; G01N33/2022; G01N33/2025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
236 words
AN APPARATUS FOR DETERMINING THE PERCENT OF OXYGEN AND NITROGEN IN A METAL SAMPLE, SAID APPARATUS COMPRISING A VACUUM-TIGHT FURNACE CHAMBER, MEANS FOR EVACUATING SAID FURNACE CHAMBER TO REMOVE ESSENTIALLY ALL OXYGEN AND NITROGEN THEREFROM, MEANS FOR CREATING IN SAID FURNACE CHAMBER A PREDETERMINED PRESSURE OF AN INERT GAS, MEANS IN SAID FURNACE CHAMBER FOR HEATING A METAL SAMPLE IN THE PRESENCE OF CARBON TO RELEASE OXYGEN IN THE FORM OF AN OXIDE OF CARBON AND ALSO TO RELEASE NITROGEN, SAID RELEASED GASES BEING DILUTED BY SAID PREDETERMINED PRESSURE OF SAID INERT GAS TO PROVIDE A KNOWN VOLUME OF SAID GAS MIXTURE AT A KNOWN PRESSURE, A CHROMATOGRAPHY COLUMN HAVING DIFFERENT RESIDENCE TIMES FOR DIFFERENT GASES, MEANS FOR PROVIDING A FLOWING STREAM OF SAID INERT GAS THROUGH SAID CHROMATOGRAPHY COLUMN AT A SUBSTANTIALLY CONSTANT TEMPERATURE AND PRESSURE, MEANS PROVIDING FOR WITHDRAWAL OF A KNOWN ALIQUOT PORTION OF SAID GAS MIXTURE FROM SAID FURNACE CHAMBER INTO A HOLDING CHAMBER OF KNOWN VOLUME AT A KNOWN PRESSURE, VALVE MEANS PERMITTING INSERTION OF SAID ALIQUOT PORTION AS A DISCRETE VOLUME INTO SAID FLOWING STREAM OF INERT GAS SO THAT SAID ALIQUOT PORTION PASSES THROUGH SAID CHROMATOGRAPHY COLUMN AT SAID CONSTANT TEMPERATURE AND PRESSURE, AND MEANS AT THE DISCHARGE END OF THE CHROMATOGRAPHY COLUMN FOR DETECTING THE CONCENTRATION OF NITROGEN AND CARBON OXIDES IN THE INERT GAS AT SAID CNSTANT TEMPERATURE AND PRESSURE AS THE GASES LEAVE THE CHROMATOGRAPHY COLUMN.
Claim 2
Independent Claim
236 words
AN APPARATUS FOR DETERMINING THE PERCENT OF OXYGEN AND NITROGEN IN A METAL SAMPLE, SAID APPARATUS COMPRISING A VACUUM-TIGHT FURNACE CHAMBER, MEANS FOR EVACUATING SAID FURNACE CHAMBER TO REMOVE ESSENTIALLY ALL OXYGEN AND NITROGEN THEREFROM, MEANS FOR CREATING IN SAID FURNACE CHAMBER A PREDETERMINED PRESSURE OF AN INERT GAS, MEANS IN SAID FURNACE CHAMBER FOR HEATING A METAL SAMPLE IN THE PRESENCE OF CARBON TO RELEASE OXYGEN IN THE FORM OF AN OXIDE OF CARBON AND ALSO TO RELEASE NITROGEN, SAID RELEASED GASES BEING DILUTED BY SAID PREDETERMINED PRESSURE OF SAID INERT GAS TO PROVIDE A KNOWN VOLUME OF SAID GAS MIXTURE AT A KNOWN PRESSURE, A CHROMATOGRAPHY COLUMN HAVING DIFFERENT RESIDENCE TIMES FOR DIFFERENT GASES, MEANS FOR PROVIDING A FLOWING STREAM OF SAID INERT GAS THROUGH SAID CHROMATOGRAPHY COLUMN AT A SUBSTANTIALLY CONSTANT TEMPERATURE AND PRESSURE, MEANS PROVIDING FOR WITHDRAWAL OF A KNOWN ALIQUOT PORTION OF SAID GAS MIXTURE FROM SAID FURNACE CHAMBER INTO A HOLDING CHAMBER OF KNOWN VOLUME AT A KNOWN PRESSURE, VALVE MEANS PERMITTING INSERTION OF SAID ALIQUOT PORTION AS A DISCRETE VOLUME INTO SAID FLOWING STREAM OF INERT GAS SO THAT SAID ALIQUOT PORTION PASSES THROUGH SAID CHROMATOGRAPHY COLUMN AT SAID CONSTANT TEMPERATURE AND PRESSURE, AND MEANS AT THE DISCHARGE END OF THE CHROMATOGRAPHY COLUMN FOR DETECTING THE CONCENTRATION OF NITROGEN AND CARBON OXIDES IN THE INERT GAS AT SAID CNSTANT TEMPERATURE AND PRESSURE AS THE GASES LEAVE THE CHROMATOGRAPHY COLUMN.
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) | 1965-11-19 | 1966-05-21 | 1966-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-19 | 1970-05-21 | 1970-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-19 | 1974-05-21 | 1974-11-20 | $7700.00 | Window Closed / Lapsed |