US2783134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of oxygen
Assignee: Standard Oil Co
•
Filing: 1953-07-03
•
Granted: 1957-02-26
•
Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 Everett C Hughes
- 👤 Harold A Strecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:59
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/02; C01B13/0203
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PRODUCTION OF OXYGEN WHICH COMPRISES HEATING TO A TEMPERATURE WITHIN THE RANGE FROM ABOUT 500 TO ABOUT 800*F., IN THE SUBSTANTIAL ABSENCE OF OXYGEN, AN OXYGEN CARRIER COMPRISING A PREFORMED SILICA GEL IMPREGNATED WITH CHROMIUM TRIOXIDE, THE AMOUNT OF CHROMIUM TRIOXIDE NOT EXCEEDING ABOUT 25% BY WEIGHT OF THE OXYGEN CARRIER, THEREBY REDUCING THE CHROMIUM TRIOXIDE TO A LOWER OXIDE DOWN TO BUT NOT INCLUDING CHROMIC OXIDE AND EVOLVING OXYGEN THEREFROM; REMOVING THE OXYGEN GAS THUS EVOLVED; AND REOXIDIZING THE REDUCED CHROMIUM OXIDE TO CHROMIUM TRIOXIDE BY HEATING IN THE PRESENCE OF AN OXYGEN-CONTAINING GAS AT A TEMPERATURE OF FROM ABOUT 600 TO 800*F.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PRODUCTION OF OXYGEN WHICH COMPRISES HEATING TO A TEMPERATURE WITHIN THE RANGE FROM ABOUT 500 TO ABOUT 800*F., IN THE SUBSTANTIAL ABSENCE OF OXYGEN, AN OXYGEN CARRIER COMPRISING A PREFORMED SILICA GEL IMPREGNATED WITH CHROMIUM TRIOXIDE, THE AMOUNT OF CHROMIUM TRIOXIDE NOT EXCEEDING ABOUT 25% BY WEIGHT OF THE OXYGEN CARRIER, THEREBY REDUCING THE CHROMIUM TRIOXIDE TO A LOWER OXIDE DOWN TO BUT NOT INCLUDING CHROMIC OXIDE AND EVOLVING OXYGEN THEREFROM; REMOVING THE OXYGEN GAS THUS EVOLVED; AND REOXIDIZING THE REDUCED CHROMIUM OXIDE TO CHROMIUM TRIOXIDE BY HEATING IN THE PRESENCE OF AN OXYGEN-CONTAINING GAS AT A TEMPERATURE OF FROM ABOUT 600 TO 800*F.
References Cited (Backward Citations)
US2381825A
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US2375402A
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US2339349A
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US2461838A
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US2490986A
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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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |