US3342881A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the preparation of fluorine derivatives of halogenated hydrocarbons
Assignee: Mitsui Bussan & Co Ltd
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Filing: 1964-01-14
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Granted: 1967-09-19
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Sasakura Makoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:14
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/20; C07C17/202; C07C17/206
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD FOR THE PREPARATION OF FLUORINE DERIVATIVES OF HALOGENATED HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF CCL4, C2CL6, CHCL3, CCL3F AND CHCL2F COMPRISING REACTING AT LEAST ONE OF SAID HALOGENATED HYDROCARBONS WITH ANHYDROUS HYDROFLUORIC ACID IN A GASEOUS PHASE AT A TEMPERATURE OF ABOUT FROM 200 TO 400*C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF (1) A COMPOSITION CONSISTING ESSENTIALLY OF METALLIC IRON AND A GRANULAR POROUS SUBSTANCE AND (2) A COMPOSITION CONSISTING ESSENTIALLY OF METALLIC IRON AND A GRANULAR POROUS SUBSTANCE CARRYING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF IRON SULPHATES, IRON OXIDES AND HYDROXIDES, SAID GRANULAR POROUS SUBSTANCE BEING SELECTED FROM THE GROUP CONSISTING OF GRANULAR ACTIVE CARBON AND GRANULAR ACTIVE ALUMINA.
Claim 2
Independent Claim
121 words
A METHOD FOR THE PREPARATION OF FLUORINE DERIVATIVES OF HALOGENATED HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF CCL4, C2CL6, CHCL3, CCL3F AND CHCL2F COMPRISING REACTING AT LEAST ONE OF SAID HALOGENATED HYDROCARBONS WITH ANHYDROUS HYDROFLUORIC ACID IN A GASEOUS PHASE AT A TEMPERATURE OF ABOUT FROM 200 TO 400*C. IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF (1) A COMPOSITION CONSISTING ESSENTIALLY OF METALLIC IRON AND A GRANULAR POROUS SUBSTANCE AND (2) A COMPOSITION CONSISTING ESSENTIALLY OF METALLIC IRON AND A GRANULAR POROUS SUBSTANCE CARRYING A MATERIAL SELECTED FROM THE GROUP CONSISTING OF IRON SULPHATES, IRON OXIDES AND HYDROXIDES, SAID GRANULAR POROUS SUBSTANCE BEING SELECTED FROM THE GROUP CONSISTING OF GRANULAR ACTIVE CARBON AND GRANULAR ACTIVE ALUMINA.
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) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |