US3178400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the copolymerization of olefins
Assignee: Montedison SpA
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Filing: 1960-12-06
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Granted: 1965-04-13
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Expires: 1980-12-06
Abstract
No abstract record available.
Inventors
- 👤 Ragazzini Mario
- 👤 Magri Roberto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:04
CPC Classifications
C; C08; C08F; C08F210/00; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR COPOLYMERIZING AT LEAST TWO ALPHA MONOOLEFINS WHICH COMPRISES POLYMERIZING SAID OLEFINS AT A TEMPERATURE RANGING FROM ABOUT A -60*C. TO A +40* C. IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A CATALYST CONSISTING ESSENTIALLY OF (A) VANADIUM TETRACHLORIDE AND (B) A MIXTURE OF ORGANO-METALLIC COMPOUNDS CONSISTING OF ALR2H AND ALR3, WHEREIN R IS AN ALKYL GROUP OF 1 TO 4 CARBON ATOMS; SAID MIXTURE CONSISTING OF ABOUT 20-50 MOLS PERCENT OF THE ALR2H AND 80-50 MOLS PERCENT OF THE ALR3 AND THE MOLAR RATIO OF THE ORGANO-METALLIC COMPOUNDS TO THE VANADIUM TETRACHLORIDE BEING APPROXIMATELY 4.
Claim 2
Dependent Claim
99 words
A PROCESS FOR COPOLYMERIZING AT LEAST TWO ALPHA MONOOLEFINS WHICH COMPRISES POLYMERIZING SAID OLEFINS AT A TEMPERATURE RANGING FROM ABOUT A -60*C. TO A +40* C. IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A CATALYST CONSISTING ESSENTIALLY OF (A) VANADIUM TETRACHLORIDE AND (B) A MIXTURE OF ORGANO-METALLIC COMPOUNDS CONSISTING OF ALR2H AND ALR3, WHEREIN R IS AN ALKYL GROUP OF 1 TO 4 CARBON ATOMS; SAID MIXTURE CONSISTING OF ABOUT 20-50 MOLS PERCENT OF THE ALR2H AND 80-50 MOLS PERCENT OF THE ALR3 AND THE MOLAR RATIO OF THE ORGANO-METALLIC COMPOUNDS TO THE VANADIUM TETRACHLORIDE BEING APPROXIMATELY 4.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |