US3318862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for reducing cold flow in 1, 3-butadiene polymers
Assignee: Phillips Petroleum Co
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Filing: 1963-06-10
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Granted: 1967-05-09
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Expires: 1983-06-10
Abstract
No abstract record available.
Inventors
- 👤 Robert A Hinton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:51
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
IN THE POLYMERIZATION OF 1, 3-BUTADIENE IN THE PRESENCE OF AN ORGANOLITHIUM INITIATOR, THE METHOD OF REDUCING THE TENDENCY OF THE POLYMER TO COLD FLOW WHICH COMPRISES ADDING TO THE POLYMERIZATION MIXTURE FROM 1.5 TO 4 MOLE OF AN AROMATIC COMPOUND CONTAINING AT LEAST TWO SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE PER MOLE OF ORGANOLITHIUM INITIATOR.
Claim 2
Dependent Claim
60 words
IN THE POLYMERIZATION OF 1, 3-BUTADIENE IN THE PRESENCE OF AN ORGANOLITHIUM INITIATOR, THE METHOD OF REDUCING THE TENDENCY OF THE POLYMER TO COLD FLOW WHICH COMPRISES ADDING TO THE POLYMERIZATION MIXTURE FROM 1.5 TO 4 MOLE OF AN AROMATIC COMPOUND CONTAINING AT LEAST TWO SUBSTITUENTS SELECTED FROM THE GROUP CONSISTING OF CHLORINE AND BROMINE PER MOLE OF ORGANOLITHIUM INITIATOR.
References Cited (Backward Citations)
US3215679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |