US3143552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction products of nitriles and sulfur trioxide
Assignee: Pure Oil Co
•
Filing: 1961-10-27
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Granted: 1964-08-04
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Expires: 1981-10-27
Abstract
No abstract record available.
Inventors
- 👤 Donald L Klass
- 👤 Brozowski Vincent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:27
CPC Classifications
C; C07; C07D; C07D291/00; C07D291/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A SOLID CRYSTALLINE REACTION PRODUCT PRODUCED BY ADDING AN ALKYL NITRILE TO A SULFUR TRIOXIDE- DIOXANE COMPLEX IN AN INERT SOLVENT AT ABOUT 0*-3*C. TO FORM A REACTION MIXTURE, USING A 1:1 MOL RATIO OF THE ALKYL NITRILE AND SULFUR TRIOXIDE, ALLOWING THE REACTION MIXTURE TO INCREASE TO ROOM TEMPERATURE, KEEPING SAID REACTION MIXTURE AT ROOM TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE A REACTION PRODUCT CONTAINING THE ALKYL NITRILE AND SULFUR TRIOXIDE IN A 1:1 MOL RATIO AND CHARACTERIZED BY AN INFRARED SPECTRUM INDICATING THE PRESENCE OF A -SO2- GROUP AND A C=N LINKAGE, AND RECOVERING THE REACTION PRODUCT FROM THE SOLVENT.
Claim 2
Dependent Claim
105 words
A SOLID CRYSTALLINE REACTION PRODUCT PRODUCED BY ADDING AN ALKYL NITRILE TO A SULFUR TRIOXIDE- DIOXANE COMPLEX IN AN INERT SOLVENT AT ABOUT 0*-3*C. TO FORM A REACTION MIXTURE, USING A 1:1 MOL RATIO OF THE ALKYL NITRILE AND SULFUR TRIOXIDE, ALLOWING THE REACTION MIXTURE TO INCREASE TO ROOM TEMPERATURE, KEEPING SAID REACTION MIXTURE AT ROOM TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO PRODUCE A REACTION PRODUCT CONTAINING THE ALKYL NITRILE AND SULFUR TRIOXIDE IN A 1:1 MOL RATIO AND CHARACTERIZED BY AN INFRARED SPECTRUM INDICATING THE PRESENCE OF A -SO2- GROUP AND A C=N LINKAGE, AND RECOVERING THE REACTION PRODUCT FROM THE SOLVENT.
References Cited (Backward Citations)
GB741770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-04 | 1968-02-03 | 1968-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-04 | 1972-02-03 | 1972-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-04 | 1976-02-03 | 1976-08-04 | $7700.00 | Window Closed / Lapsed |