Patent US2874030A successfully refreshed from Google Patents.
US2874030A
Expired / Lapsed
US
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Argon purification
Assignee: Airco Inc
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Filing: 1952-12-19
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Granted: 1959-02-17
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Expires: 1972-12-19
Abstract
No abstract record available.
Inventors
- 👤 Dennis Wolcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
C; C01; C01B; C01B23/00; F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04642; F25J3/04648; F25J3/04721; F25J3/04733; F25J3/04739; F25J2205/00; F25J2205/82; Y; Y10; Y10S; Y10S62/00; Y10S62/923; Y10S62/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF PURIFYING IMPURE ARGON CONTAINING OXYGEN AS AN IMPURITY COMPRISING ADDING HYDROGEN TO SAID IMPURE ARGON, IN EXCESS OF THE STOICHIOMETRIC AMOUNT REQUIRED FOR THE REACTION OF SAID HYDROGEN WITH THE OXYGEN IMPURITY TO FORM WATER, PASSING THE RESULTING GAS MIXTURE OVER A CATALYST ADAPTED TO PROMOTE A CATALYTIC REACTION BETWEEN THE OXYGEN AND HYDROGEN TO FORM WATER AND A SUBSTANTIALLY OXYGEN-FREE ARGON, ANALYZING SAID OXYGEN-FREE ARGON TO DETECT THE PRESENCE OF RESIDUAL HYDROGEN IN EXCESS OF THE STOICHIOMETRIC AMOUNT REQUIRED FOR SAID CATALYTIC REACTION AND CONTROLLING THE ADDITION OF SAID HYDROGEN TO SAID IMPURE ARGON IN RESPONSE THERETO TO MAINTAIN SAID EXCESS, RECYCLING ARGON FROM WHICH THE OXYGEN HAS BEEN REMOVED TO SAID CATALYTIC REACTION AND MAINTAING THE CONCENTRATION OF OXYGEN IN SAID REACTION BELOW ABOUT THREE PERCENT, DRYING OXYGEN-FREE ARGON OBTAINED FROM SAID CATALYTIC AND RECTIFYING SAID
Claim 2
Independent Claim
141 words
THE METHOD OF PURIFYING IMPURE ARGON CONTAINING OXYGEN AS AN IMPURITY COMPRISING ADDING HYDROGEN TO SAID IMPURE ARGON, IN EXCESS OF THE STOICHIOMETRIC AMOUNT REQUIRED FOR THE REACTION OF SAID HYDROGEN WITH THE OXYGEN IMPURITY TO FORM WATER, PASSING THE RESULTING GAS MIXTURE OVER A CATALYST ADAPTED TO PROMOTE A CATALYTIC REACTION BETWEEN THE OXYGEN AND HYDROGEN TO FORM WATER AND A SUBSTANTIALLY OXYGEN-FREE ARGON, ANALYZING SAID OXYGEN-FREE ARGON TO DETECT THE PRESENCE OF RESIDUAL HYDROGEN IN EXCESS OF THE STOICHIOMETRIC AMOUNT REQUIRED FOR SAID CATALYTIC REACTION AND CONTROLLING THE ADDITION OF SAID HYDROGEN TO SAID IMPURE ARGON IN RESPONSE THERETO TO MAINTAIN SAID EXCESS, RECYCLING ARGON FROM WHICH THE OXYGEN HAS BEEN REMOVED TO SAID CATALYTIC REACTION AND MAINTAING THE CONCENTRATION OF OXYGEN IN SAID REACTION BELOW ABOUT THREE PERCENT, DRYING OXYGEN-FREE ARGON OBTAINED FROM SAID CATALYTIC AND RECTIFYING SAID
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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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |