Patent US2657238A successfully refreshed from Google Patents.
US2657238A
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US
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Catalyzed reactions between hydrogen sulfide or dimercaptans and dialkenyl ethers orpolyalkenyl amines
Assignee: Shell Development Co
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Filing: 1950-06-22
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Granted: 1953-10-27
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Expires: 1970-06-22
Abstract
No abstract record available.
Inventors
- 👤 William E Vaughan
- 👤 Harman Denham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:50
CPC Classifications
C; C10; C10M; C10M3/00; C07; C07C; C07C323/00; C10M2221/00; C10M2221/02; C10M2221/04; C10M2221/043; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19051; Y10T74/19056
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS WHICH COMPRISES HEATING A COMPOUND HAVING THE FORMULA R-X-R WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND THE ALIPHATIC DIMERCAPTANS IN THE PRESENCE OF FROM 1 TO 10 MOL PER CENT OF AN ALIPHATIC AMINE AND REMOVING FROM THE PRODUCT SO FORMED A FRACTION THEREOF VOLATILIZING BELOW ABOUT 100* C. AT 5 CM. MERCURY PRESSURE, THE R''S IN SAID FORMULA REPRESENTING ALKENYL RADICALS AND THE X REPRESENTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF -O-, -S-, AND
Claim 2
Dependent Claim
84 words
THE PROCESS WHICH COMPRISES HEATING A COMPOUND HAVING THE FORMULA R-X-R WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROGEN SULFIDE AND THE ALIPHATIC DIMERCAPTANS IN THE PRESENCE OF FROM 1 TO 10 MOL PER CENT OF AN ALIPHATIC AMINE AND REMOVING FROM THE PRODUCT SO FORMED A FRACTION THEREOF VOLATILIZING BELOW ABOUT 100* C. AT 5 CM. MERCURY PRESSURE, THE R''S IN SAID FORMULA REPRESENTING ALKENYL RADICALS AND THE X REPRESENTING A MEMBER SELECTED FROM THE GROUP CONSISTING OF -O-, -S-, AND
References Cited (Backward Citations)
US2562844A
Cited
US2517564A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |