US2879135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sulfuric acid
Assignee: Bayer AG
•
Filing: 1955-03-21
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Granted: 1959-03-24
•
Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Haltmeier Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:49
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/765; C01B17/7655
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN A PROCESS FOR THE MANUFACTURE OF SULFURIC ACID FROM THE OXIDES OF SULFUR EVOLVED IN THE ROASTING OF SULFUR-CONTAINING MATERIALS, THE IMPROVEMENT COMPRISING ROASTING SAID SULFUR CONTAINING MATERIALS WITH HEATED AIR CONTAINING SULFUR TRIOXIDE AND SULFUR DIOXIDE IN THE FORM OF MIST, SAID HEATED AIR AND MIST BEING EVOLVED FROM COOLING THE SULFURIC ACID BY DIRECT CONTACT WITH AIR.
Claim 2
Dependent Claim
60 words
IN A PROCESS FOR THE MANUFACTURE OF SULFURIC ACID FROM THE OXIDES OF SULFUR EVOLVED IN THE ROASTING OF SULFUR-CONTAINING MATERIALS, THE IMPROVEMENT COMPRISING ROASTING SAID SULFUR CONTAINING MATERIALS WITH HEATED AIR CONTAINING SULFUR TRIOXIDE AND SULFUR DIOXIDE IN THE FORM OF MIST, SAID HEATED AIR AND MIST BEING EVOLVED FROM COOLING THE SULFURIC ACID BY DIRECT CONTACT WITH AIR.
References Cited (Backward Citations)
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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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |