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Patent US3823185A successfully refreshed from Google Patents.
US3823185A
Expired / Lapsed
US
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Improved process for the preparation of ethoxylated isethionates
Assignee: Henkel Corp
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Filing: 1973-06-18
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Granted: 1974-07-09
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Expires: 1993-06-18
Abstract
Abstract A PROCESS IS PROVIDED WHEREBY IMPROVEMENT OF THE PRODUCTION OF ETHOXYLATED ISETHIONATES IN AN AQUEOUS MEDIUM IS ACHIEVED. IN THIS IMPROVED PROCESS THE SELECTIVITY OF ETHYLENE OXIDE TO THE DESIRED ETHOXYLATED PRODUCTS IS SIGNIFICANTLY INCREASED BY REMOVAL OF ALL OR A SUBSTANTIAL PART OF THE WATER PRESENT IN THE EARLY STAGES OF THE REACTION AFTER A SMALL AMOUNT OF ETHYLENE OXIDE HAS REACTED. ADDITIONALLY, ETHOXYLATED ISETHIONATES HAVING FROM ABOUT 2 TO ABOUT 30 ETHYLENE OXIDE REPEATING UNITS AND CONTAINING LESS THAN 25% UNDESIRABLE GLYCOL-ETHER BY-PRODUCTS ARE PROVIDED.
Inventors
- 👤 I Schlossman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:37
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |