US2643938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of spent sulfuric acid
Assignee: Phillips Petroleum Co
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Filing: 1947-08-18
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Granted: 1953-06-30
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Expires: 1967-08-18
Abstract
No abstract record available.
Inventors
- 👤 Sam P Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:29
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/905
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN IMPROVED PROCESS FOR PARTIALLY CONCENTRATING A SULFURIC ACID CONTAINING ORGANIC MATERIAL, WHICH COMPRISES THE STEPS OF ADMIXING HOT COMBUSTION GASES AND AN OXIDIZING AGENT AT A TEMPERATURE WITHIN THE RANGE OF 1100* F. TO 3000* F. SO AS TO DECOMPOSE SAID OXIDIZING AGENT TO LIBERATE NASCENT OXYGEN; IMMEDIATELY INTRODUCING SAID RESULTING ADMIXTURE INTO SAID SULFURIC ACID, WHEREBY ORGANIC MATERIAL IS OXIDIZED BY REACTION WITH SAID NASCENT OXYGEN AND A PORTION OF THE WATER CONTENT OF SAID ACID IS VAPORIZED; AND REMOVING SAID OXIDIZED MATERIAL AND SAID WATER VAPOR FROM SAID ACID.
Claim 2
Dependent Claim
92 words
AN IMPROVED PROCESS FOR PARTIALLY CONCENTRATING A SULFURIC ACID CONTAINING ORGANIC MATERIAL, WHICH COMPRISES THE STEPS OF ADMIXING HOT COMBUSTION GASES AND AN OXIDIZING AGENT AT A TEMPERATURE WITHIN THE RANGE OF 1100* F. TO 3000* F. SO AS TO DECOMPOSE SAID OXIDIZING AGENT TO LIBERATE NASCENT OXYGEN; IMMEDIATELY INTRODUCING SAID RESULTING ADMIXTURE INTO SAID SULFURIC ACID, WHEREBY ORGANIC MATERIAL IS OXIDIZED BY REACTION WITH SAID NASCENT OXYGEN AND A PORTION OF THE WATER CONTENT OF SAID ACID IS VAPORIZED; AND REMOVING SAID OXIDIZED MATERIAL AND SAID WATER VAPOR FROM SAID ACID.
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) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |