Patent US2854476A successfully refreshed from Google Patents.
US2854476A
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Method of sulfonation with a sulfur trioxide addition product
Assignee: Universal Oil Products Co
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Filing: 1955-04-21
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Granted: 1958-09-30
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Expires: 1975-04-21
Abstract
No abstract record available.
Inventors
- 👤 Joseph A Chenicek
- 👤 Herman S Bloch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:24
CPC Classifications
C; C07; C07B; C07B45/00; C07B45/02; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/06; C07C303/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE SULFONATION OF A SULFONATABLE ORGANIC COMPOUND WITH SULFUR TRIOXIDE, THE IMPROVEMENT WHICH COMPRISES SUPPLYING THE SULFUR TRIOXIDE TO THE SULFONATING REACTION IN THE FORM OF AN ADDITION PRODUCT THEREOF WITH A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF AN ALCOHOL SULFATE ESTER, AN ALKANE SULFONIC ACID AND AN AROMATIC HYDROCARBON SULFONIC ACID, THE AMOUNT OF SAID ADDITION PRODUCT BEING SUFFICIENT TO FURNISH ALL OF THE SULFUR TRIXOIDE REQUIRED FOR THE SULFONATION OF SAID ORGANIC COMPOUND..
Claim 2
Dependent Claim
78 words
IN THE SULFONATION OF A SULFONATABLE ORGANIC COMPOUND WITH SULFUR TRIOXIDE, THE IMPROVEMENT WHICH COMPRISES SUPPLYING THE SULFUR TRIOXIDE TO THE SULFONATING REACTION IN THE FORM OF AN ADDITION PRODUCT THEREOF WITH A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF AN ALCOHOL SULFATE ESTER, AN ALKANE SULFONIC ACID AND AN AROMATIC HYDROCARBON SULFONIC ACID, THE AMOUNT OF SAID ADDITION PRODUCT BEING SUFFICIENT TO FURNISH ALL OF THE SULFUR TRIXOIDE REQUIRED FOR THE SULFONATION OF SAID ORGANIC COMPOUND..
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) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |