Patent US3294770A successfully refreshed from Google Patents.
US3294770A
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US
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Process for the polymerization of vinyl monomers in the presence of metal alcoholates
Assignee: Edison SpA
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Filing: 1963-03-18
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Granted: 1966-12-27
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Ragazzini Mario
- 👤 Gallinella Enzo
- 👤 Borsini Giancarlo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:48
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/02; C08F14/04; C08F14/06; C08F4/00; C08F4/06; C08F4/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
PROCESS FOR THE POLYMERIZATION OF VINYL CHLORIDE, IN MASS, IN THE PRESENCE OF INERT SOLVENTS OR IN THE PRESENCE OF POLAR, SOLVENTS, IN ORDER TO OBTAIN POLYVINYL CHLORIDES WITH A HIGH SYNDYOTACTIC INDEX WHICH COMPRISES POLYMERIZING VINYL CHLORIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF THE MONO- AND DIALCOHOLATES OF ALUMINUM ALKYL, THE TRI-ALCOHOLATES OF ALUMINUM, THE ALKYL ALCOHOLATE OF MAGNESIUM, THE DIALCOHOLATES OF MAGNESIUM AND THE ALCOHOLATES OF LITHIUM.
Claim 2
Dependent Claim
75 words
PROCESS FOR THE POLYMERIZATION OF VINYL CHLORIDE, IN MASS, IN THE PRESENCE OF INERT SOLVENTS OR IN THE PRESENCE OF POLAR, SOLVENTS, IN ORDER TO OBTAIN POLYVINYL CHLORIDES WITH A HIGH SYNDYOTACTIC INDEX WHICH COMPRISES POLYMERIZING VINYL CHLORIDE IN THE PRESENCE OF A CATALYST SELECTED FROM THE CLASS CONSISTING OF THE MONO- AND DIALCOHOLATES OF ALUMINUM ALKYL, THE TRI-ALCOHOLATES OF ALUMINUM, THE ALKYL ALCOHOLATE OF MAGNESIUM, THE DIALCOHOLATES OF MAGNESIUM AND THE ALCOHOLATES OF LITHIUM.
References Cited (Backward Citations)
US2608554A
Cited
US2641604A
Cited
US3141007A
Cited
US2970977A
Cited
US3088939A
Cited
US2948712A
Cited
US3068263A
Cited
US3098060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |