Patent US3487161A successfully refreshed from Google Patents.
Patent US3405114A successfully refreshed from Google Patents.
US3405114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 1, 3-diene polymers
Assignee: BASF SE
•
Filing: 1966-06-20
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Granted: 1968-10-08
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Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 Naarmann Herbert
- 👤 Eilingsfeld Heinz
- 👤 Kastning Ernst-Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:58
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C08F36/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR THE PRODUCTION OF 1,3-DIENE POLYMERS BY POLYMERIZING 1,3-DIENES HAVING FOUR TO SIX CARBON ATOMS WHEREIN A POLYMERIZATION CATALYST IS USED WHICH COMPRISES A TRANSITION METAL CHELATE COMPLEX OF A THIOA,B-DICARBONYL COMPOUND.
Claim 2
Dependent Claim
34 words
A PROCESS FOR THE PRODUCTION OF 1,3-DIENE POLYMERS BY POLYMERIZING 1,3-DIENES HAVING FOUR TO SIX CARBON ATOMS WHEREIN A POLYMERIZATION CATALYST IS USED WHICH COMPRISES A TRANSITION METAL CHELATE COMPLEX OF A THIOA,B-DICARBONYL COMPOUND.
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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |