Patent US3215747A successfully refreshed from Google Patents.
US3215747A
Expired / Lapsed
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Method of separating trifluoroethylene from tetrafluoroethylene
Assignee: Pennwalt Corp
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Filing: 1963-05-31
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Granted: 1965-11-02
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Fainberg Arnold Harold
- 👤 Hauptschein Murray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:33
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/38; C07C17/389
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD FOR SEPARATING TRIFLUOROETHYLENE FROM TETRAFLUOROETHYLENE WHICH COMPRISES CONTACTING A MIXTURE OF TETRAFLUOROETHYLENE AND TRIFLUOROETHYLENE CONTAINING NOT MORE THAN 2% BY WEIGHT OF TRIFLUOROETHYLENE WITH A CRYSTALLINE METAL ALUMINOSILICATE HAVING IN THE DEHYDRATED FORM A STABEL, THREE-DIMENSIONAL NETWORD OF SIO4 AND ALO4 TETRAHEDRA CONTAINING INTERSTITIAL METAL CATIONS, SAID NETWORK PROVIDING INTRACRYSTALLINE VOIDS INTERCONNECTED BY PORES HAVING AN EFFECTIVE DIAMETER OF AT LEAST ABOUT 5 A., THEREBY PREFERENTIALLY ADSORBINT SAID TRIFLUOROETHYLENE ON SAID ALUMINOSILICATE, AND RECOVERING TETRAFLUOROETHYLENE ESSENTIALLY FREE FROM TRIFLUOROETHYLENE.
Claim 2
Independent Claim
81 words
A METHOD FOR SEPARATING TRIFLUOROETHYLENE FROM TETRAFLUOROETHYLENE WHICH COMPRISES CONTACTING A MIXTURE OF TETRAFLUOROETHYLENE AND TRIFLUOROETHYLENE CONTAINING NOT MORE THAN 2% BY WEIGHT OF TRIFLUOROETHYLENE WITH A CRYSTALLINE METAL ALUMINOSILICATE HAVING IN THE DEHYDRATED FORM A STABEL, THREE-DIMENSIONAL NETWORD OF SIO4 AND ALO4 TETRAHEDRA CONTAINING INTERSTITIAL METAL CATIONS, SAID NETWORK PROVIDING INTRACRYSTALLINE VOIDS INTERCONNECTED BY PORES HAVING AN EFFECTIVE DIAMETER OF AT LEAST ABOUT 5 A., THEREBY PREFERENTIALLY ADSORBINT SAID TRIFLUOROETHYLENE ON SAID ALUMINOSILICATE, AND RECOVERING TETRAFLUOROETHYLENE ESSENTIALLY FREE FROM TRIFLUOROETHYLENE.
References Cited (Backward Citations)
US2917556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |