US2979532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of dialkyl disulfides
Assignee: Fort James Corp
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Filing: 1959-02-09
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Granted: 1961-04-11
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Expires: 1979-02-09
Abstract
No abstract record available.
Inventors
- 👤 Warren S Macgregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:57
CPC Classifications
C; C07; C07C; C07C319/00; C07C319/22; C07C319/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR THE PREPARTION OF DIALKYL DISULFIDES WHICH COMPRISES HEATING AND REACTING A LOWER ALKYL MERCAPTAN HAVING FROM 1 TO 3 CARBON TOMS WITH A FREE OXYGEN-CONTAINING GAS IN THE PRESENCE OF A CATALYST COMPOSED OF ACTIVATED CARBON CONTAINING AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND IRON FOR A PERIOD OF TIME SUFFICIENT TO EFFECT A SUBSTANTIALLY COMPLETE CONVERSION OF THE MERCAPTAN TO THE CORRESPONDING DISULFIDE, AND RECOVERING THE DISULFIDE FROM THE REACTION MIXTURE, SAID CATALYST HAVING BEEN PREPARED BY TREATING ACTIVATED CARBON WITH A SOLUTION OF A SALT OF SAID METAL AND THEREAFTER CONVERTING SAID SALT TO THE OXIDE OF SAID METAL, SAID OXIDE BEING INTIMATELY COMBINED WITH THE ACTIVATED CARBON.
Claim 2
Dependent Claim
119 words
A PROCESS FOR THE PREPARTION OF DIALKYL DISULFIDES WHICH COMPRISES HEATING AND REACTING A LOWER ALKYL MERCAPTAN HAVING FROM 1 TO 3 CARBON TOMS WITH A FREE OXYGEN-CONTAINING GAS IN THE PRESENCE OF A CATALYST COMPOSED OF ACTIVATED CARBON CONTAINING AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COPPER AND IRON FOR A PERIOD OF TIME SUFFICIENT TO EFFECT A SUBSTANTIALLY COMPLETE CONVERSION OF THE MERCAPTAN TO THE CORRESPONDING DISULFIDE, AND RECOVERING THE DISULFIDE FROM THE REACTION MIXTURE, SAID CATALYST HAVING BEEN PREPARED BY TREATING ACTIVATED CARBON WITH A SOLUTION OF A SALT OF SAID METAL AND THEREAFTER CONVERTING SAID SALT TO THE OXIDE OF SAID METAL, SAID OXIDE BEING INTIMATELY COMBINED WITH THE ACTIVATED CARBON.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |