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US2718526A
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Production of alkyl aromatic sulfonic acids and the alkylate therefor
Assignee: Universal Oil Products Co
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Filing: 1951-11-23
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Granted: 1955-09-20
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Expires: 1971-11-23
Abstract
No abstract record available.
Inventors
- 👤 Howard E Mammen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:45
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31; C07C303/00; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS WHICH COMPRISES ALKYLATING AN AROMATIC HYDROCARBON WITH AN OLEFINIC HYDROCARBON OF FROM ABOUT 9 TO ABOUT 18 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF A SULFURIC ACID ALKYLATION CATALYST, SULFONATING THE RESULTANT ALKYLATED AROMATIC HYDROCARBON WITH SULFURIC ACID OLEUM, AND SUPPLYING USED OLEUM FROM THE SULFONATING STEP TO THE ALKYLATING STEP TO CONSTITUTE AT LEAST A PART OF SAID ALKYLATION CATALYST.
Claim 2
Dependent Claim
64 words
A PROCESS WHICH COMPRISES ALKYLATING AN AROMATIC HYDROCARBON WITH AN OLEFINIC HYDROCARBON OF FROM ABOUT 9 TO ABOUT 18 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF A SULFURIC ACID ALKYLATION CATALYST, SULFONATING THE RESULTANT ALKYLATED AROMATIC HYDROCARBON WITH SULFURIC ACID OLEUM, AND SUPPLYING USED OLEUM FROM THE SULFONATING STEP TO THE ALKYLATING STEP TO CONSTITUTE AT LEAST A PART OF SAID ALKYLATION CATALYST.
References Cited (Backward Citations)
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US2456119A
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US2479120A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |