Patent US3054754A successfully refreshed from Google Patents.
US3054754A
Expired / Lapsed
US
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Catalysts for the preparation of trans 1, 4 polyisoprene (synthetic balata) and methods for their preparation
Assignee: Uniroyal Inc
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Filing: 1959-03-16
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Granted: 1962-09-18
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Expires: 1979-03-16
Abstract
No abstract record available.
Inventors
- 👤 Jack S Lasky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:21
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/08; B; B01; B01J; B01J27/00; B01J27/06; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A METHOD FOR THE PREPARTION OF A CATALYST FOR THE POLYMERIZATION OF ISOPRENE TO TRANSPOLYISOPRENE WHICH COMPRISES DECOMPOSING VANADIUM TETRACHLORIDE IN THE PRESENCE OF A FINELY DIVIDE INERT SOILD SUPPORTING BASE, THEREBY COATING THE SURFACE OF SAID BASE WITH A THIN LAYER OF VANADIUM TRICHLORIDE, SUSPENDING THE SUPPORTED VANADIUM TRICHLORIDE IN AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF AROMATIC LIQUID HYDROCARBONS, SATURATED ALIPHATIC LIQUID HYDROCARBONS, AND ISOPRENE, AND ADDING THERTO AN ALUMINUM TRIALKYL TO FORM THE ACTUAL POLYMERIZATIO-ACTIVE CATALYTIC SURFACE, THE MOLAR RATIO OF ALUMINUM TRIALKYL TO VANADIUM TRICHLORIDE BEING FROM 3:1 TO 20:1.
Claim 2
Independent Claim
96 words
A METHOD FOR THE PREPARTION OF A CATALYST FOR THE POLYMERIZATION OF ISOPRENE TO TRANSPOLYISOPRENE WHICH COMPRISES DECOMPOSING VANADIUM TETRACHLORIDE IN THE PRESENCE OF A FINELY DIVIDE INERT SOILD SUPPORTING BASE, THEREBY COATING THE SURFACE OF SAID BASE WITH A THIN LAYER OF VANADIUM TRICHLORIDE, SUSPENDING THE SUPPORTED VANADIUM TRICHLORIDE IN AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF AROMATIC LIQUID HYDROCARBONS, SATURATED ALIPHATIC LIQUID HYDROCARBONS, AND ISOPRENE, AND ADDING THERTO AN ALUMINUM TRIALKYL TO FORM THE ACTUAL POLYMERIZATIO-ACTIVE CATALYTIC SURFACE, THE MOLAR RATIO OF ALUMINUM TRIALKYL TO VANADIUM TRICHLORIDE BEING FROM 3:1 TO 20:1.
Claim 3
Independent Claim
96 words
A METHOD FOR THE PREPARATION OF A CATALYST FOR THE POLYMERIZATION OF ISOPRENE TO TRANSPOLYISOPRENE WHICH COMPRISES SUSPENDING A FINELY DIVIDED INERT SOLID SUPPORTING BASE IN AN ORGANIC SOLVENT SOLUTION OF VANADIUM TRTRACHLORIDE, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC LIQUID HYDROCARBON, SATURATED ALIPHATIC LIQUID HYDROCARBONS, AND ISOPRENE, DECOMPOSING SAID VANADIUM TETRACHLORIDE TO FORM VANADIUM TRICHLORIDE BY HEATING THE SUSPENSION TO A TEMPERATURE OF FROM 50* C. TO 200*C. THEREBY COATING THE SURFACE OF SAID BASE WITH A THIN LAYER OF VANADIUM TRICHLORIDE, REMOVING THE ORGANIC SOLVENT, AND RECOVERING SOLVENT-FREE SUPPORTED VANADIUM TRICHLORIDE.
Claim 4
Independent Claim
96 words
A METHOD FOR THE PREPARATION OF A CATALYST FOR THE POLYMERIZATION OF ISOPRENE TO TRANSPOLYISOPRENE WHICH COMPRISES SUSPENDING A FINELY DIVIDED INERT SOLID SUPPORTING BASE IN AN ORGANIC SOLVENT SOLUTION OF VANADIUM TRTRACHLORIDE, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF AROMATIC LIQUID HYDROCARBON, SATURATED ALIPHATIC LIQUID HYDROCARBONS, AND ISOPRENE, DECOMPOSING SAID VANADIUM TETRACHLORIDE TO FORM VANADIUM TRICHLORIDE BY HEATING THE SUSPENSION TO A TEMPERATURE OF FROM 50* C. TO 200*C. THEREBY COATING THE SURFACE OF SAID BASE WITH A THIN LAYER OF VANADIUM TRICHLORIDE, REMOVING THE ORGANIC SOLVENT, AND RECOVERING SOLVENT-FREE SUPPORTED VANADIUM TRICHLORIDE.
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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) | 1965-09-17 | 1966-03-19 | 1966-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-17 | 1970-03-19 | 1970-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-17 | 1974-03-19 | 1974-09-18 | $7700.00 | Window Closed / Lapsed |