US3022357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of fluorocarbons
Assignee: EIDP Inc
•
Filing: 1959-10-08
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Granted: 1962-02-20
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Expires: 1979-10-08
Abstract
No abstract record available.
Inventors
- 👤 Kasper Klaus Bernd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/395
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS OF SEPARATING PERFLUOROBUTYNE-2 FROM HEXAFLUOROPROPYLENE WHICH COMPRISES REACTING A MIXTURE OF HEXAFLUOROPROPYLENE AND PERFLUOROBUTYNE-2 WITH AMMONIA IN A LIQUID PHASE SELECTED FROM THE CLASS CONSISTING OF WATER AND LIQUEFIED REAGENTS, THE CONCENTRATION OF SAID AMMONIA BEING FROM 1 TO 30 WEIGHT PERCENT OF THE LIQUID PHASE WHEN SAID LIQUID PHASE IS WATER, AND FROM 0.01 TO 1.5 WEIGHT PERCENT WHEN SAID LIQUID PHASE COMPRISES THE LIQUEFIED REAGENTS, AND RECOVERING HEXAFLUOROPROPYLENE.
Claim 2
Dependent Claim
72 words
A PROCESS OF SEPARATING PERFLUOROBUTYNE-2 FROM HEXAFLUOROPROPYLENE WHICH COMPRISES REACTING A MIXTURE OF HEXAFLUOROPROPYLENE AND PERFLUOROBUTYNE-2 WITH AMMONIA IN A LIQUID PHASE SELECTED FROM THE CLASS CONSISTING OF WATER AND LIQUEFIED REAGENTS, THE CONCENTRATION OF SAID AMMONIA BEING FROM 1 TO 30 WEIGHT PERCENT OF THE LIQUID PHASE WHEN SAID LIQUID PHASE IS WATER, AND FROM 0.01 TO 1.5 WEIGHT PERCENT WHEN SAID LIQUID PHASE COMPRISES THE LIQUEFIED REAGENTS, AND RECOVERING HEXAFLUOROPROPYLENE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |