US2839474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalysts and catalytic processes
Assignee: Standard Oil Co
•
Filing: 1953-08-21
•
Granted: 1958-06-17
•
Expires: 1973-08-21
Abstract
No abstract record available.
Inventors
- 👤 Carl E Johnson
- 👤 Wilford J Zimmerschied
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:55
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2527/00; C07C2527/06; C07C2527/135; C07C2531/00; C07C2531/02; C07C2531/26; C07C2531/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE PROCESS OF PREPARING A SOLID MATERIAL WHICH IS CATALYTICALLY ACTIVE FOR THE POLYMERIZATION OF PROPYLENE, WHICH PROCESS COMPRISES HEATING A HALIDE OF TITANIUM SELECTED FROM THE GROUP CONSISTING OF TITANIUM FLUORIDES, CHLORIDES AND BROMIDES WITH A LOWER ALKYL ESTER CONTAINING NOT MORE THAN 6 CARBON ATOMS PER ALKYL GROUP OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC AND TRIPHOSPHORIC ACIDS, THE MOLAR RATIO OF HALOGEN AS HALIDE IN SAID REACTION MIXTURE TO ALKYL GROUPS BEING BETWEEN ABOUT 0.3 AND ABOUT 1, SAID HEATING BEING CONDUCTED AT A TEMPERATURE SUFFICIENT TO EFFECT SUBSTANTIAL EVOLUTION OF ALKYL HALIDE FROM SAID REACTION MIXTURE, CONTINUING SAID HEATING UNTIL SAID REACTION MIXTURE IS SUBSTANTIALLY FREE OF HALOGEN, AND RECOVERING A SOLID CATALYTIC MATERIAL THUS PRODUCED.
Claim 2
Dependent Claim
123 words
THE PROCESS OF PREPARING A SOLID MATERIAL WHICH IS CATALYTICALLY ACTIVE FOR THE POLYMERIZATION OF PROPYLENE, WHICH PROCESS COMPRISES HEATING A HALIDE OF TITANIUM SELECTED FROM THE GROUP CONSISTING OF TITANIUM FLUORIDES, CHLORIDES AND BROMIDES WITH A LOWER ALKYL ESTER CONTAINING NOT MORE THAN 6 CARBON ATOMS PER ALKYL GROUP OF AN ACID SELECTED FROM THE GROUP CONSISTING OF ORTHOPHOSPHORIC AND TRIPHOSPHORIC ACIDS, THE MOLAR RATIO OF HALOGEN AS HALIDE IN SAID REACTION MIXTURE TO ALKYL GROUPS BEING BETWEEN ABOUT 0.3 AND ABOUT 1, SAID HEATING BEING CONDUCTED AT A TEMPERATURE SUFFICIENT TO EFFECT SUBSTANTIAL EVOLUTION OF ALKYL HALIDE FROM SAID REACTION MIXTURE, CONTINUING SAID HEATING UNTIL SAID REACTION MIXTURE IS SUBSTANTIALLY FREE OF HALOGEN, AND RECOVERING A SOLID CATALYTIC MATERIAL THUS PRODUCED.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-16 | 1961-12-16 | 1962-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-16 | 1965-12-16 | 1966-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-16 | 1969-12-16 | 1970-06-17 | $7700.00 | Window Closed / Lapsed |