Patent US348690A successfully refreshed from Google Patents.
US3043889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fluoroethylenes
Assignee: Honeywell International Inc
•
Filing: 1960-03-22
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Granted: 1962-07-10
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Expires: 1980-03-22
Abstract
No abstract record available.
Inventors
- 👤 Lee B Smith
- 👤 Woolf Cyril
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:54
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/23; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS FOR MAKING CCIF=CF2 WHICH COMPRISES CHARGING INTO A REACTAION ZONE A VAPOR-PHASE MIXTURE OF CCL2FCCLF2 AND HYDROGEN IN MOL PROPORTIONS OF NOT LESS THAN 1.25 MOLS OF CCL2FCCLF2 PER MOL OF HYDROGEN, SUBJECTING SAID MIXTURE TO HEATING IN SAID ZONE TO TEMPERATURES SUBSTANTIALLY IN THE RANGE OF 475-550*C. WHILE IN THE PRESENCE OF A CATALYST CONSISTING OF CHROMIUM OXIDE AND FOR CONTACT TIME SUBSTANTIALLY IN THE RANGE OF 2-15 SECONDS TO EFFECT PER PASS CONVERSION OF CCL2FCCLF2 SUBSTANTIALLY IN THE RANGE 15-30%, SAID REACTION ZONE BEING DEFINED BY SOLID SURFACES OF NON-METALLIC REFRACTORY OXIDE MATERIAL OF THE GROUP CONSISTING OF ALUNDUM, PORCELAIN, FUSED SILICA AND ZIRCONIA, AND RECOVERING CCLF=CF2 FROM THE MATERIALS EXITING THE REACTION ZONE.
Claim 2
Dependent Claim
118 words
THE PROCESS FOR MAKING CCIF=CF2 WHICH COMPRISES CHARGING INTO A REACTAION ZONE A VAPOR-PHASE MIXTURE OF CCL2FCCLF2 AND HYDROGEN IN MOL PROPORTIONS OF NOT LESS THAN 1.25 MOLS OF CCL2FCCLF2 PER MOL OF HYDROGEN, SUBJECTING SAID MIXTURE TO HEATING IN SAID ZONE TO TEMPERATURES SUBSTANTIALLY IN THE RANGE OF 475-550*C. WHILE IN THE PRESENCE OF A CATALYST CONSISTING OF CHROMIUM OXIDE AND FOR CONTACT TIME SUBSTANTIALLY IN THE RANGE OF 2-15 SECONDS TO EFFECT PER PASS CONVERSION OF CCL2FCCLF2 SUBSTANTIALLY IN THE RANGE 15-30%, SAID REACTION ZONE BEING DEFINED BY SOLID SURFACES OF NON-METALLIC REFRACTORY OXIDE MATERIAL OF THE GROUP CONSISTING OF ALUNDUM, PORCELAIN, FUSED SILICA AND ZIRCONIA, AND RECOVERING CCLF=CF2 FROM THE MATERIALS EXITING THE REACTION ZONE.
References Cited (Backward Citations)
US2697124A
Cited
US2864873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |