US3133906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of crystalline high polymers of vinyl alkyl ethers
Assignee: Montedison SpA
•
Filing: 1959-06-12
•
Granted: 1964-05-19
•
Expires: 1979-06-12
Abstract
No abstract record available.
Inventors
- 👤 Natta Giulio
- 👤 Asta Gino Dall
- 👤 Oddo Nino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:47
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; C; C08; C08F; C08F16/00; C08F16/12; C08G; C08G77/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A PROCESS FOR THE PRODUCTION OF CRYSTALLINE, HIGH MOLECULAR WEIGHT POLYMERS OF VINYL ETHERS HAVING THE GENERAL FORMULA CH2=CHOR IN WHICH R IS AN ALKYL RADICAL CONTAINING FROM 1 TO 8 CARBON ATOMS, WHICH PROCESS COMPRISES CONTACTING THE MONOMERIC VINYL ETHER TO BE POLYMERIZED, IN AN INERT HYDROCARBON SOLVENT AND AT A TEMPERATURE OF FROM -30*C. TO -100*C., WITH A CATALYST CONSISTING ESSENTIALLY OF A SUBSTANCE HAVING THE FORMULA XNMERM WHERE ME IS AN ATOM OF A MULTIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF TRIVALENT ALUMINUM, TETRAVALENT TITANIUM, TETRAVALENT TIN, TETRAVALENT VANADIUM PENTAVALENT VANADIUM, TRIVALENT CHROMIUM AND TRIVALENT IRON; X IS HALOGEN, R IS AN ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL ARYL, ALKOXY AND MONOCARBOXYLIC ACID RADICALS, AND N AND M ARE EACH AT LEAST EQUAL TO 1, THE SUM OF N+M BEING EQUAL TO THE VALENCY OF THE METAL ME.
Claim 2
Dependent Claim
145 words
A PROCESS FOR THE PRODUCTION OF CRYSTALLINE, HIGH MOLECULAR WEIGHT POLYMERS OF VINYL ETHERS HAVING THE GENERAL FORMULA CH2=CHOR IN WHICH R IS AN ALKYL RADICAL CONTAINING FROM 1 TO 8 CARBON ATOMS, WHICH PROCESS COMPRISES CONTACTING THE MONOMERIC VINYL ETHER TO BE POLYMERIZED, IN AN INERT HYDROCARBON SOLVENT AND AT A TEMPERATURE OF FROM -30*C. TO -100*C., WITH A CATALYST CONSISTING ESSENTIALLY OF A SUBSTANCE HAVING THE FORMULA XNMERM WHERE ME IS AN ATOM OF A MULTIVALENT METAL SELECTED FROM THE GROUP CONSISTING OF TRIVALENT ALUMINUM, TETRAVALENT TITANIUM, TETRAVALENT TIN, TETRAVALENT VANADIUM PENTAVALENT VANADIUM, TRIVALENT CHROMIUM AND TRIVALENT IRON; X IS HALOGEN, R IS AN ORGANIC RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL ARYL, ALKOXY AND MONOCARBOXYLIC ACID RADICALS, AND N AND M ARE EACH AT LEAST EQUAL TO 1, THE SUM OF N+M BEING EQUAL TO THE VALENCY OF THE METAL ME.
References Cited (Backward Citations)
US2846427A
Cited
US2984656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |