US3087975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making halogenated organic compounds
Assignee: Pennwalt Corp
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Filing: 1960-04-12
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Granted: 1963-04-30
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Expires: 1980-04-12
Abstract
No abstract record available.
Inventors
- 👤 Hauptschein Murray
- 👤 Arnold H Fainberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:04
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/37; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A METHOD FOR COVERING A PERFLUOROCHLOROMETHANE STARTING MATERIAL CONTAINING FROM 1 TO 3 FLUORINE ATOMS INTO METHANES OF HIGHER FLUORINE CONTENT WHICH COMPRISES THE STEP OF CONTACTING SAID STARTING MATERIAL AT A TEMPERATURE BETWEEN 150* AND 600*C. WITH A CATALYST PREPARED BY REACTING ACTIVATED ALUMINA WITH A LOWER FLUOROCARBON HAVING NOT MORE THAN ONE HYDROGEN ATOM, SAID REACTION BEING CARRIED OUT BY CONTACTING VAPORS OF SAID FLUOROCARBON WITH ACTIVATED ALUMINA AT A TEMPERATURE OF THE ORDER TO 150*C. TO 800*C. SUFFICIENTLY HIGH TO INITIATE AN EXOTHERMIC REACTION BETWEEN SAID FLUOROCARBON AND SAID ALUMINA IN THE COURSE OF WHICH REACTION SAID FLUOROCARBON IS CONVERTED TO CARBON OXIDE AND SAID ALUMINA INCREASES IN WEIGHT DUE TO THE ASSOCIATION OF FLUORINE DERIVED FROM SAID FLUOROCARBON THEREWITH, SAID CONTACTING AND THE REACTION BETWEEN SAID FLUOROCARBON AND SAID ALUMINA BEING CONTINUED UNTIL THE EVOLUTION OF CARBON OXIDE SUBSTANTIALLY CEASES, WHEREUPON THE THUS TREATED ALUMINA IS AN ACTIVE CATALYST FOR THE CONVERSION OF PERFLOROCHLOROMETHANES INTO METHANES OF HIGHER FLUORINE CONTENT.
Claim 2
Independent Claim
164 words
A METHOD FOR COVERING A PERFLUOROCHLOROMETHANE STARTING MATERIAL CONTAINING FROM 1 TO 3 FLUORINE ATOMS INTO METHANES OF HIGHER FLUORINE CONTENT WHICH COMPRISES THE STEP OF CONTACTING SAID STARTING MATERIAL AT A TEMPERATURE BETWEEN 150* AND 600*C. WITH A CATALYST PREPARED BY REACTING ACTIVATED ALUMINA WITH A LOWER FLUOROCARBON HAVING NOT MORE THAN ONE HYDROGEN ATOM, SAID REACTION BEING CARRIED OUT BY CONTACTING VAPORS OF SAID FLUOROCARBON WITH ACTIVATED ALUMINA AT A TEMPERATURE OF THE ORDER TO 150*C. TO 800*C. SUFFICIENTLY HIGH TO INITIATE AN EXOTHERMIC REACTION BETWEEN SAID FLUOROCARBON AND SAID ALUMINA IN THE COURSE OF WHICH REACTION SAID FLUOROCARBON IS CONVERTED TO CARBON OXIDE AND SAID ALUMINA INCREASES IN WEIGHT DUE TO THE ASSOCIATION OF FLUORINE DERIVED FROM SAID FLUOROCARBON THEREWITH, SAID CONTACTING AND THE REACTION BETWEEN SAID FLUOROCARBON AND SAID ALUMINA BEING CONTINUED UNTIL THE EVOLUTION OF CARBON OXIDE SUBSTANTIALLY CEASES, WHEREUPON THE THUS TREATED ALUMINA IS AN ACTIVE CATALYST FOR THE CONVERSION OF PERFLOROCHLOROMETHANES INTO METHANES OF HIGHER FLUORINE CONTENT.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |