US3311604A
Expired / Lapsed
US
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Process for polymerizing isoprene with a catalyst consisting of titanium tetrachloride and an aluminum hydride
Assignee: Snam SpA
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Filing: 1963-08-01
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Granted: 1967-03-28
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Expires: 1983-08-01
Abstract
No abstract record available.
Inventors
- 👤 Marconi Walter
- 👤 Mazzei Alessandro
- 👤 Cucinella Salvatore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:25
CPC Classifications
C; C08; C08F; C08F136/00; C08F136/02; C08F136/04; C08F136/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A PROCESS FOR THE STEREOSPECIFIC POLYMERIZATION OF ISOPRENE IN SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PRESENCE OF A CATALYTIC SYSTEM CONSISTING OF TITANIUM TETRACHLORIDE ANDN ALUMINUM COMPOUND IN WHICH THE ALUMINUM COMPOUND IS AN ALUMINUM HYDRIDE OF THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
40 words
A PROCESS FOR THE STEREOSPECIFIC POLYMERIZATION OF ISOPRENE IN SUBSTANTIALLY ANHYDROUS CONDITIONS IN THE PRESENCE OF A CATALYTIC SYSTEM CONSISTING OF TITANIUM TETRACHLORIDE ANDN ALUMINUM COMPOUND IN WHICH THE ALUMINUM COMPOUND IS AN ALUMINUM HYDRIDE OF THE FOLLOWING GENERAL FORMULA:
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |