US3205213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cis-1, 4 polybutadiene with a titanium tetrachloride-aluminum alkyl-iodine catalyst
Assignee: Bridgestone Firestone Inc
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Filing: 1959-04-13
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Granted: 1965-09-07
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Expires: 1979-04-13
Abstract
No abstract record available.
Inventors
- 👤 Richard S Stearns
- 👤 Fono Andrew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:45
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
PROCESS OF POLYMEERIZING BUTADIENE TO YIELD POLYMERS CONTAINING THE POLYMERIZED BUTADIENE UNITS LARGELY IN CIS1,4 CONFIGURATION THEREIN, WHICH COMPRISES CONTACTING BUTADIENE, AT TEMPERATURES IN THE RANGE -40*C. TO 150*C., WITH A CATALYST WHICH IS A REACTION PRODUCT OF AN ALUMINUM ALKYL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, DIALKYL ALUMINUM MONOCHLORIDES AND MONOALKYL ALUMINUM DICHLORIDES IN WHICH THE ALKYL GROUPS CONTAIN FROM 1 TO 30 CARBON ATOMS, WITH TITANIUM TETRACHLORIDE AND ELEMENTAL IODINE, THE MOLAR RATIOS OF THE COMPONENTS ENTERING INTO THE CATALYST BEING AS FOLLOWS: E/MOLE OF TICL4 = 1/1 TO 30/1
Claim 2
Dependent Claim
94 words
PROCESS OF POLYMEERIZING BUTADIENE TO YIELD POLYMERS CONTAINING THE POLYMERIZED BUTADIENE UNITS LARGELY IN CIS1,4 CONFIGURATION THEREIN, WHICH COMPRISES CONTACTING BUTADIENE, AT TEMPERATURES IN THE RANGE -40*C. TO 150*C., WITH A CATALYST WHICH IS A REACTION PRODUCT OF AN ALUMINUM ALKYL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM TRIALKYLS, DIALKYL ALUMINUM MONOCHLORIDES AND MONOALKYL ALUMINUM DICHLORIDES IN WHICH THE ALKYL GROUPS CONTAIN FROM 1 TO 30 CARBON ATOMS, WITH TITANIUM TETRACHLORIDE AND ELEMENTAL IODINE, THE MOLAR RATIOS OF THE COMPONENTS ENTERING INTO THE CATALYST BEING AS FOLLOWS: E/MOLE OF TICL4 = 1/1 TO 30/1
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |