US2694739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disproportionation of chlorofluoromethanes
Assignee: EIDP Inc
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Filing: 1952-03-07
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Granted: 1954-11-16
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Expires: 1972-03-07
Abstract
No abstract record available.
Inventors
- 👤 John R Pailthorp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/37; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
THE PROCESS WHICH COMPRISES PASSING A SUBSTANTIALLY ANHYDROUS CHLOROFLUOROMETHANE CONSISTING OF CARBON, CHLORINE AND FLUORINE AND CONTAINING 2 TO 3 CHLORINE ATOMS, AND 1 TO 2 FLUORINE ATOMS IN THE VAPOR PHASE FIRST THROUGH A BED COMPOSED OF FROM ABOUT 10% TO ABOUT 20% BY WEIGHT OF SUBSTANTIALLY ANHYDROUS ALUMINUM CHLORIDE SUPPORTED ON ACTIVATED ALUMINA AND THEN THROUGH A BED ORIGINALLY CONSISTING ESSENTIALLY OF ACTIVATED ALUMINA AT RATE OF FROM ABOUT 15 TO ABOUT 85 GRAMS OF SUCH CHLOROFLUOROMETHANE VAPOR PER HOUR PER GRAM OF ALUMINUM CHLORIDE WHILE MAINTAINING A TEMPERATURE OF FROM ABOUT 90* C. TO ABOUT 190* C. IN THE FIRST BED AND A TEMPERATURE OF FROM 80* C. TO ABOUT 190* C. IN THE SECOND BED
Claim 2
Dependent Claim
119 words
THE PROCESS WHICH COMPRISES PASSING A SUBSTANTIALLY ANHYDROUS CHLOROFLUOROMETHANE CONSISTING OF CARBON, CHLORINE AND FLUORINE AND CONTAINING 2 TO 3 CHLORINE ATOMS, AND 1 TO 2 FLUORINE ATOMS IN THE VAPOR PHASE FIRST THROUGH A BED COMPOSED OF FROM ABOUT 10% TO ABOUT 20% BY WEIGHT OF SUBSTANTIALLY ANHYDROUS ALUMINUM CHLORIDE SUPPORTED ON ACTIVATED ALUMINA AND THEN THROUGH A BED ORIGINALLY CONSISTING ESSENTIALLY OF ACTIVATED ALUMINA AT RATE OF FROM ABOUT 15 TO ABOUT 85 GRAMS OF SUCH CHLOROFLUOROMETHANE VAPOR PER HOUR PER GRAM OF ALUMINUM CHLORIDE WHILE MAINTAINING A TEMPERATURE OF FROM ABOUT 90* C. TO ABOUT 190* C. IN THE FIRST BED AND A TEMPERATURE OF FROM 80* C. TO ABOUT 190* C. IN THE SECOND BED
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |