US2939878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of fluoronitriles
Assignee: Dow Chemical Co
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Filing: 1958-10-22
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Granted: 1960-06-07
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Expires: 1978-10-22
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ruh
- 👤 Ralph A Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:18
CPC Classifications
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Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
THE PROCESS OF PREPARING FLUORONITRILES WHICH INCLUDES CONTACTING CYANOGEN CHLORIDE AT TEMPERATURES FROM ABOUT 500*C. TO ABOUT 750*C., AND FOR A CONTACT TIME FROM ABOUT 5 TO ABOUT 30 SECONDS WITH A DIFFUOROMETHANE CONTAINING FROM 0 TO 1 CHLORINE ATOMS AND HAVING A MOLECULAR WEIGHT OF FROM 52 TO 87 AND AT A MOLE RATIO OF CYANOGEN CHLORIDE TO DIFLUOROMETHANE OF FROM ABOUT 0.5:1.4, AND SEPARATING FROM THE REACTION MIXTURE WHICH ARE FLUORONITRILE REACTION PRODUCTS CONTAINING FROM 2 TO 3 CARBON ATOMS.
Claim 2
Dependent Claim
82 words
THE PROCESS OF PREPARING FLUORONITRILES WHICH INCLUDES CONTACTING CYANOGEN CHLORIDE AT TEMPERATURES FROM ABOUT 500*C. TO ABOUT 750*C., AND FOR A CONTACT TIME FROM ABOUT 5 TO ABOUT 30 SECONDS WITH A DIFFUOROMETHANE CONTAINING FROM 0 TO 1 CHLORINE ATOMS AND HAVING A MOLECULAR WEIGHT OF FROM 52 TO 87 AND AT A MOLE RATIO OF CYANOGEN CHLORIDE TO DIFLUOROMETHANE OF FROM ABOUT 0.5:1.4, AND SEPARATING FROM THE REACTION MIXTURE WHICH ARE FLUORONITRILE REACTION PRODUCTS CONTAINING FROM 2 TO 3 CARBON ATOMS.
References Cited (Backward Citations)
GB794559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |