US2522475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of disposing of fumes containing sulfuric acid
Assignee: Standard Oil Development Co
•
Filing: 1946-03-22
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Granted: 1950-09-12
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 James L Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:31
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; Y; Y10; Y10S; Y10S159/00; Y10S159/19; Y10S261/00; Y10S261/09; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
A METHOD FOR TREATING FUME CONTAINING DROPLETS OF SULFURIC ACID-WATER SOLUTION INCLUDING THE STEPS OF ADDING HEAT THERETO TO INCREASE THE TEMPERATURE OF THE HEATED GASES TO AT LEAST 400* F. AND WITH THE ADDITION OF APPROXIMATELY 500,000 B. T. U. PER POUND OF SULFURIC ACID IN THE HEATED GASES, AND SUBSEQUENTLY DISCHARGING THE HEATED GASES TO THE ATOMOSPHERE TO FORM A GAS-AIR MIXTURE HAVING AN ACID CONTENT EXPRESSED ON THE BASIS OF SO3 OF 1.7 MILLIGRAMS SO3 PER CUBIC FOOT OF DRY GAS-AIR MIXTURE WHEN SAID GAS-AIR MIXTURE REACHES ITS DEW POINT.
Claim 2
Independent Claim
93 words
A METHOD FOR TREATING FUME CONTAINING DROPLETS OF SULFURIC ACID-WATER SOLUTION INCLUDING THE STEPS OF ADDING HEAT THERETO TO INCREASE THE TEMPERATURE OF THE HEATED GASES TO AT LEAST 400* F. AND WITH THE ADDITION OF APPROXIMATELY 500,000 B. T. U. PER POUND OF SULFURIC ACID IN THE HEATED GASES, AND SUBSEQUENTLY DISCHARGING THE HEATED GASES TO THE ATOMOSPHERE TO FORM A GAS-AIR MIXTURE HAVING AN ACID CONTENT EXPRESSED ON THE BASIS OF SO3 OF 1.7 MILLIGRAMS SO3 PER CUBIC FOOT OF DRY GAS-AIR MIXTURE WHEN SAID GAS-AIR MIXTURE REACHES ITS DEW POINT.
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) | 1953-09-11 | 1954-03-13 | 1954-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-11 | 1958-03-13 | 1958-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-11 | 1962-03-13 | 1962-09-12 | $7700.00 | Window Closed / Lapsed |