Patent US2805642A successfully refreshed from Google Patents.
Patent US2535677A successfully refreshed from Google Patents.
US2535677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of ether sulfonates
Assignee: Rohm and Haas Co
•
Filing: 1947-02-15
•
Granted: 1950-12-26
•
Expires: 1967-02-15
Abstract
No abstract record available.
Inventors
- 👤 Charles S Hollander
- 👤 Louis H Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:45
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/32; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
38 words
PROCESS FOR PREPARING DODECYLOXYETHANE SODIUM SULFONATE WHICH COMPRISES REACTING BY HEATING TOGETHER DODECYL ALCOHOL AND SODIUM ISETHIONATE IN THE PRESENCE OF SODIUM HYDROXIDE AS A CATALYST AT ABOUT 200* C. WITH REMOVAL OF WATER FORMED DURING THE REACTION.
Claim 2
Dependent Claim
38 words
PROCESS FOR PREPARING DODECYLOXYETHANE SODIUM SULFONATE WHICH COMPRISES REACTING BY HEATING TOGETHER DODECYL ALCOHOL AND SODIUM ISETHIONATE IN THE PRESENCE OF SODIUM HYDROXIDE AS A CATALYST AT ABOUT 200* C. WITH REMOVAL OF WATER FORMED DURING THE REACTION.
References Cited (Backward Citations)
US1733721A
Cited
US1985747A
Cited
US2282469A
Cited
US1994927A
Cited
US2143759A
Cited
US2110847A
Cited
US2204339A
Cited
US2399434A
Cited
US2427577A
Cited
US2480859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |