US3042489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of sulfuric acid
Assignee: STWB Inc
•
Filing: 1958-11-20
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Granted: 1962-07-03
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Expires: 1978-11-20
Abstract
No abstract record available.
Inventors
- 👤 Eugene W Schoeffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:17
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A NON-CATALYTIC PROCESS FOR PREPARING SULFURIC ACID BY THE DIRECT OXIDATION OF SULFUR, THE STEPS WHICH COMPRISE: INTRODUCING ONE PART OF SULFLUR AND AT LEAST FOUR PARTS OF WATER BY WEIGHT INTO AN ACID-RESISTANT REACTOR; INTRODUCING GASEOUS OXYGEN INTO SAID REACTOR, SAID OXYGEN BEING PRESSENT IN AN AMOUNT IN EXCESS OVER THAT AMOUNT THEORETICALLY REQUIRED TO CONVERT ALL THE SULFUR TO SULFUR TRIOXIDE; MAINTAING THE REACTOR CONTEMTS AT A TEMPERATURE BETWEEN ABOUT 275 AND 360 DEGREES CENTIGRADE AND UNDER A PRESURE OF AT LELAST 800 POUNDS PER SQURE INCH; AND SEPARATING SLUFURIC ACID FROM THE REACTION PRODUCT.
Claim 2
Dependent Claim
98 words
IN A NON-CATALYTIC PROCESS FOR PREPARING SULFURIC ACID BY THE DIRECT OXIDATION OF SULFUR, THE STEPS WHICH COMPRISE: INTRODUCING ONE PART OF SULFLUR AND AT LEAST FOUR PARTS OF WATER BY WEIGHT INTO AN ACID-RESISTANT REACTOR; INTRODUCING GASEOUS OXYGEN INTO SAID REACTOR, SAID OXYGEN BEING PRESSENT IN AN AMOUNT IN EXCESS OVER THAT AMOUNT THEORETICALLY REQUIRED TO CONVERT ALL THE SULFUR TO SULFUR TRIOXIDE; MAINTAING THE REACTOR CONTEMTS AT A TEMPERATURE BETWEEN ABOUT 275 AND 360 DEGREES CENTIGRADE AND UNDER A PRESURE OF AT LELAST 800 POUNDS PER SQURE INCH; AND SEPARATING SLUFURIC ACID FROM THE REACTION PRODUCT.
References Cited (Backward Citations)
US816918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |