US3218306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shortstopping organometallic polymerized butadiene with an oxirane compound or anhydride
Assignee: Phillips Petroleum Co
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Filing: 1962-06-11
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Granted: 1965-11-16
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Henry L Hsieh
- 👤 Charles W Strobel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:15
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF TERMINATING THE POLYMERIZATION OF BUTADIENET IN THE PRESENCE OF AN ORGANOMETALLIC CATALYST SYSTEM CONTAINING IODINE, SAID CATALYST SYSTEM BEING EFFECTIVE TO PRODUCE BUTADIENE POLYMERS HAVING AT LEAST 85 PERCENT CIS-1,4 ADDITION WHICH COMPRISES ADDING TO THE REACTION MIXTURE A COMPOUND OF CARBON, OXYGEN AND HYDROGEN SELECTED FROM THE GROUP CONSISTING OF OXIRANE COMPOUNDS AND ANHYDRIDES, SAID COMPOUND BEING ADDED AT THE CONCLUSION OF SAID POLYMERIZATION IN AN AMOUNT OF FROM 0.1 TO 1 PART BY WEIGHT PER 100 PARTS OF POLYMER FORMED.
Claim 2
Independent Claim
85 words
A METHOD OF TERMINATING THE POLYMERIZATION OF BUTADIENET IN THE PRESENCE OF AN ORGANOMETALLIC CATALYST SYSTEM CONTAINING IODINE, SAID CATALYST SYSTEM BEING EFFECTIVE TO PRODUCE BUTADIENE POLYMERS HAVING AT LEAST 85 PERCENT CIS-1,4 ADDITION WHICH COMPRISES ADDING TO THE REACTION MIXTURE A COMPOUND OF CARBON, OXYGEN AND HYDROGEN SELECTED FROM THE GROUP CONSISTING OF OXIRANE COMPOUNDS AND ANHYDRIDES, SAID COMPOUND BEING ADDED AT THE CONCLUSION OF SAID POLYMERIZATION IN AN AMOUNT OF FROM 0.1 TO 1 PART BY WEIGHT PER 100 PARTS OF POLYMER FORMED.
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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |