Patent US4618449A successfully refreshed from Google Patents.
US4618449A
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Method for the termination of living polymers, and compounds suitable for the purpose
Assignee: Enichem Elastomeri SpA
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Filing: 1984-04-19
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Granted: 1986-10-21
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Expires: 2004-04-19
Abstract
Abstract Coupling agents of general formula ##STR1## and their use in a method for the termination of living polymers obtained by anionic polymerization of diene and/or vinylaromatic monomers.
Inventors
- 👤 Arnaldo Roggero
- 👤 Mario Bruzzone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:38
CPC Classifications
C; C08; C08C; C08C19/00; C08C19/30; C08C19/42; C08C19/44; C08G; C08G81/00; C08G81/02; C08G81/021; C08G81/022
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
13 words
A coupling agent for living macroanions comprising a mixture of 2,6-distyrylpyridine and 2,4,6-tristyrylpyridine.
Claim 2
Dependent Claim
13 words
A coupling agent for living macroanions comprising a mixture of 2,6-distyrylpyridine and 2,4,6-tristyrylpyridine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |