US3306940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of perfluoroolefins
Assignee: EIDP Inc
•
Filing: 1960-09-28
•
Granted: 1967-02-28
•
Expires: 1980-09-28
Abstract
No abstract record available.
Inventors
- 👤 Halliwell Ronald Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:50
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/26; C07C17/263; C07C17/269
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A PROCESS FOR THE CO-SYNTHESIS OF HEXAFLUOROPORPYLENE AND TETRAFLUOROETHYLENE WHICH COMPRISES PYROLYSING CHLORODIFLUOROMETHANE AT A TEMPERATURE IN THE RANGE BETWEEN 700* C. AND 900* C. AT A PARTIAL PRESSURE BETWEEN 0.1 AND 2.0 ATMOSPHERES AND AT A CONVERSION LEVEL BETWEEN 86% AND 94% BASED ON THE CHLORODIFLUOROMETHANE CHARHED, COOLING THE REACTIO PRODUCT AND THEREAFTER SEPARATING TETRAFLUOROETHYLENE AND HEXAFLUOROPROPYLENE FROM THE REACTION PRODUCT.
Claim 2
Dependent Claim
62 words
A PROCESS FOR THE CO-SYNTHESIS OF HEXAFLUOROPORPYLENE AND TETRAFLUOROETHYLENE WHICH COMPRISES PYROLYSING CHLORODIFLUOROMETHANE AT A TEMPERATURE IN THE RANGE BETWEEN 700* C. AND 900* C. AT A PARTIAL PRESSURE BETWEEN 0.1 AND 2.0 ATMOSPHERES AND AT A CONVERSION LEVEL BETWEEN 86% AND 94% BASED ON THE CHLORODIFLUOROMETHANE CHARHED, COOLING THE REACTIO PRODUCT AND THEREAFTER SEPARATING TETRAFLUOROETHYLENE AND HEXAFLUOROPROPYLENE FROM THE REACTION PRODUCT.
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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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |