US3277145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for production of sulfuric acid esters
Assignee: GAF Chemicals Corp
•
Filing: 1961-07-27
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Granted: 1966-10-04
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Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Peter O Shull
- 👤 Robert E Leary
- 👤 Dalton W Rowland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:32
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/24; B; B01; B01J; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR PREPARING A SULFURIC ACID MONO-ESTER WHICH COMPRISES PROGRESSIVELY SPRAYING CHLOROSULFONIC ACID INTO A STREAM OF INERT GAS AND A LIQUID SO PROPORTIONED AS TO YIELD A VOLUME RATIO OF GAS TO LIQUID FROM 50:1 TO 300:1, AND MOVING AT A VELOCITY AT LEAST 5 TIMES THE CRITICAL VELOCITY OF THE GASEOUS COMPONENT OF SAID STREAM IN A CONDUIT SO AS TO PRODUCE A HIGHLY TURBULENT FROTH, SAID LIQUID CONTAINING AN ORGANIC COMPOUND HAVING AT LEAST ONE PRIMARY ALCOHOLIC HYDROXYL GROUP BUT NO OTHER RADICAL OF COMPARABLE OR GREATER REACTIVITY TOWARD CHLOROSULFONIC ACID, CONTINUING ADVANCEMENT OF SAID CONDUITCONFINED STREAM FOR A PERIOD OF 0.1 SECOND TO 2 MINUTES WHILE MAINTAINING THE TEMPERATURE THEREOF BETWEEN 5 AND 100*C., AND SEPARATING THE LIQUID FROM THE GASEOUS PHASE UPON DISCHARGE OF SAID STREAM FROM SAID CONDUIT AT THE END OF SAID PERIOD.
Claim 2
Dependent Claim
141 words
A PROCESS FOR PREPARING A SULFURIC ACID MONO-ESTER WHICH COMPRISES PROGRESSIVELY SPRAYING CHLOROSULFONIC ACID INTO A STREAM OF INERT GAS AND A LIQUID SO PROPORTIONED AS TO YIELD A VOLUME RATIO OF GAS TO LIQUID FROM 50:1 TO 300:1, AND MOVING AT A VELOCITY AT LEAST 5 TIMES THE CRITICAL VELOCITY OF THE GASEOUS COMPONENT OF SAID STREAM IN A CONDUIT SO AS TO PRODUCE A HIGHLY TURBULENT FROTH, SAID LIQUID CONTAINING AN ORGANIC COMPOUND HAVING AT LEAST ONE PRIMARY ALCOHOLIC HYDROXYL GROUP BUT NO OTHER RADICAL OF COMPARABLE OR GREATER REACTIVITY TOWARD CHLOROSULFONIC ACID, CONTINUING ADVANCEMENT OF SAID CONDUITCONFINED STREAM FOR A PERIOD OF 0.1 SECOND TO 2 MINUTES WHILE MAINTAINING THE TEMPERATURE THEREOF BETWEEN 5 AND 100*C., AND SEPARATING THE LIQUID FROM THE GASEOUS PHASE UPON DISCHARGE OF SAID STREAM FROM SAID CONDUIT AT THE END OF SAID PERIOD.
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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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |