US3129190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of anhydrous frbebel-crafts
Assignee: —
•
Filing: —
•
Granted: 1964-04-14
•
Expires: 1981-04-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:29
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/128; B01J21/00; B01J21/18; B01J23/00; B01J23/70; B01J23/74; B01J23/745; B01J2523/00; B01J2523/80; B01J2523/84; B01J2523/842
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE PROCESS FOR PRODUCING AN ANHYDROUS FRIEDELCRAFTS CATALYST SELECTED FROM THE GROUP CONSITING OF FECL3, ALCL3, AD GACL3 AND MIXTURES THEREOF WHICH COMPRISES ADDING THE SAID CATALYST, CONTAINING WATER OF HYDRATION, TO CARBON TETRACHLORIDE, REFLUXING THE RESULTING ADMIXTURE AT A TEMPERATURE OF ABOUT 76.8*C., UNTIL THE EVOLUTION OF PHOSGENE AND HYDROGEN CHLORIDE CEASES, SWEEPING THE REACTION MIXTURE WITH DRY AIR, COOLING THE REACTION MIXTURE AND DECANTING THE CARBON TETRACHLORIDE AND RECOVERING THE ANHYDROUS CATALYST, FREE FROM CCL4.
Claim 2
Dependent Claim
77 words
THE PROCESS FOR PRODUCING AN ANHYDROUS FRIEDELCRAFTS CATALYST SELECTED FROM THE GROUP CONSITING OF FECL3, ALCL3, AD GACL3 AND MIXTURES THEREOF WHICH COMPRISES ADDING THE SAID CATALYST, CONTAINING WATER OF HYDRATION, TO CARBON TETRACHLORIDE, REFLUXING THE RESULTING ADMIXTURE AT A TEMPERATURE OF ABOUT 76.8*C., UNTIL THE EVOLUTION OF PHOSGENE AND HYDROGEN CHLORIDE CEASES, SWEEPING THE REACTION MIXTURE WITH DRY AIR, COOLING THE REACTION MIXTURE AND DECANTING THE CARBON TETRACHLORIDE AND RECOVERING THE ANHYDROUS CATALYST, FREE FROM CCL4.
References Cited (Backward Citations)
US2394412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-14 | 1967-10-14 | 1968-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-14 | 1971-10-14 | 1972-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-14 | 1975-10-14 | 1976-04-14 | $7700.00 | Window Closed / Lapsed |