US2768199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of sulfonating alkyl aromatic hydrocarbons
Assignee: Individual
•
Filing: 1953-12-08
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Granted: 1956-10-23
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Expires: 1973-12-08
Abstract
No abstract record available.
Inventors
- 👤 Horace E Luntz
- 👤 Daniel O Popovac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:51
CPC Classifications
C; C07; C07C; C07C309/00; C07C303/00; C07C303/02; C07C303/04; C07C303/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A CONTINUOUS SULFONATION PROCESS WHICH COMPRISES: APPLYING A FILM OF AN ALKYL ARYL HYDROCARBON TO A REFRIGERATED SURFACE, INTRODUCTING A SULFONATING AGENT INTO SAID FILM OF ALKYL ARYL HYDROCARBON IN AN AMOUNT THAT IS INSUFFICIENT TO EFFECT COMPLETE SULFONATION AT A POINT CLOSELY IN ADVANCE OF A PROGRESSIVELY MOVING SCRAPER, RE-APPLYING TO SAID SURFACE THE PARTIALLY SULFONATED ALKYL ARYL HYDROCARBON SCRAPED THEREFROM AS A FILM, INTRODUCING AN ADDITIONAL QUANTITY OF SULFONATING AGENT INTO SAID FILM OF PARTIALLY SULFONATED ALKYL ARYL HYDROCARBON UNTIL SULFONATION THEREOF IS COMPLETE, AND THEN COLLECTING THE COMPLETELY SULFONATED ALKYL ARYL HYDROCARBON.
Claim 2
Dependent Claim
95 words
A CONTINUOUS SULFONATION PROCESS WHICH COMPRISES: APPLYING A FILM OF AN ALKYL ARYL HYDROCARBON TO A REFRIGERATED SURFACE, INTRODUCTING A SULFONATING AGENT INTO SAID FILM OF ALKYL ARYL HYDROCARBON IN AN AMOUNT THAT IS INSUFFICIENT TO EFFECT COMPLETE SULFONATION AT A POINT CLOSELY IN ADVANCE OF A PROGRESSIVELY MOVING SCRAPER, RE-APPLYING TO SAID SURFACE THE PARTIALLY SULFONATED ALKYL ARYL HYDROCARBON SCRAPED THEREFROM AS A FILM, INTRODUCING AN ADDITIONAL QUANTITY OF SULFONATING AGENT INTO SAID FILM OF PARTIALLY SULFONATED ALKYL ARYL HYDROCARBON UNTIL SULFONATION THEREOF IS COMPLETE, AND THEN COLLECTING THE COMPLETELY SULFONATED ALKYL ARYL HYDROCARBON.
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) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |