Patent US3822219A successfully refreshed from Google Patents.
US3822219A
Expired / Lapsed
US
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Catalyst composition
Assignee: Gulf Resources and Chem Corp
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Filing: 1972-08-30
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Granted: 1974-07-02
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Expires: 1992-08-30
Abstract
Abstract HYDROCARBON-SOLUBLE ORGANOMETALLIC COMPLEXES OF METALS OF GROUPS I AND IIA OF THE PERIODIC SYSTEM, EXEMPLIFIED BY COMPLEXES OF DI-N:BUTYLPOTASSIUM, SAID COMPLEXES BEING LITHIUM OR N-BUTYLPOTASSIUM, SAID COMPLEXED BEING USEFUL AS ANIONIC CATALYSTS IN CONNECTION WITH POLYMERIZATIONS OF MONOMERS SUCH AS, FOR INSTANCE, THOSE OF CONJUGATED DIENES EXEMPLIFIED BY ISPRENE AND OF 1,3-BUTADIENE, AND AS CATALYST IN CONNECTION WITH TELOMERIZATIONS SUCH AS, FOR INSTANCE, THE TELOMERIZATION OF BENZENE OR TOLUENE WITH ISOPRENE OR 1.3-BUTADIENE.
Inventors
- 👤 C Kamienski
- 👤 J Eastham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:59
CPC Classifications
C; C08; C08F; C08F36/00; C08F36/02; C08F36/04; C07; C07F; C07F3/00; C07F3/02; C07C; C07C2531/00; C07C2531/02; C07C2531/12
Claims Analysis
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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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |