US3215679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of polymers of isoprene and butadiene
Assignee: Phillips Petroleum Co
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Filing: 1961-12-22
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Granted: 1965-11-02
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Expires: 1981-12-22
Abstract
No abstract record available.
Inventors
- 👤 William J Trepka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:09
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR THE POLYMERIZATION OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, AND MIXTURES THEREOF COMPRISING CONTACTING SAID MONOMER UNDER POLYMERIZATION CONDITIONS WITH AN INITIATOR SELECTED FROM THE GROUP CONSISTING OF 1,3-DILITHIOBENZENE, 3-BROMOPHENYLLITHIUM, 3-BROMO-1-NAPHTHYLLITHIUM, 3-CHLOROPHENYLLITHIUM, 3-CHLORO-1-NAPHTHYLLITHIUM, 3-FLUOROPHENYLLITHIUM, 3-FLUORO-1-NAPHTHYLLITHIUM, 1-CHLORO-3-NAPHTHYLLITHIUM, 1-FLUORO-3-NAPHTHYLLITHIUM, 1-BROMO-3-NAPHTHYLLITHIUM, AND MIXTURES THEREOF.
Claim 2
Dependent Claim
48 words
A PROCESS FOR THE POLYMERIZATION OF A MONOMER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE, ISOPRENE, AND MIXTURES THEREOF COMPRISING CONTACTING SAID MONOMER UNDER POLYMERIZATION CONDITIONS WITH AN INITIATOR SELECTED FROM THE GROUP CONSISTING OF 1,3-DILITHIOBENZENE, 3-BROMOPHENYLLITHIUM, 3-BROMO-1-NAPHTHYLLITHIUM, 3-CHLOROPHENYLLITHIUM, 3-CHLORO-1-NAPHTHYLLITHIUM, 3-FLUOROPHENYLLITHIUM, 3-FLUORO-1-NAPHTHYLLITHIUM, 1-CHLORO-3-NAPHTHYLLITHIUM, 1-FLUORO-3-NAPHTHYLLITHIUM, 1-BROMO-3-NAPHTHYLLITHIUM, AND MIXTURES THEREOF.
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |