US3225019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric polymers
Assignee: Union Carbide Corp
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Filing: 1961-06-30
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Granted: 1965-12-21
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Expires: 1981-06-30
Abstract
No abstract record available.
Inventors
- 👤 Edward Charles Leonard Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:56
CPC Classifications
C; C08; C08F; C08F210/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A METHOD OF PREPARING COPOLYMERS OF ETHYLENE AND 1-OLEFINS HAVING FROM ABOUT 4 TO 20 PERCENT BY WEIGHT 1-OLEFIN POLYMERIZED THEREIN WHICH COMPRISES THE STEPS OF CONTACTING ETHYLENE AND 1-OLEFIN MONOMERS HAVING FROM 3 TO 5, INCLUSIVE, CARBON ATOMS IN A RATIO OF BETWEEN ABOUT 0.03 TO ABOUT 0.3 MOLE OF 1-OLEFIN MONOMER PER MOLE OF ETHYLENE WITH A CATALYST COMPOSITION CONSISTING ESSENTIALLY OF A TRIALKYL ALUMINUM COMPOUND WHEREIN THE ALKYL GROUPS OF THE SAID ALUMINUM COMPOUND HAVE FROM ABOUT 1 TO 8 CARBON ATOMS AND PURPLE TITANIUM TRICHLORIDE IN THE PRESENCE OF AN INERT NON-POLAR SOLVENT FOR THE MONOMERS AT A TEMPERATURE BETWEEN ABOUT 110*C. AND 140*C.
Claim 2
Independent Claim
108 words
A METHOD OF PREPARING COPOLYMERS OF ETHYLENE AND 1-OLEFINS HAVING FROM ABOUT 4 TO 20 PERCENT BY WEIGHT 1-OLEFIN POLYMERIZED THEREIN WHICH COMPRISES THE STEPS OF CONTACTING ETHYLENE AND 1-OLEFIN MONOMERS HAVING FROM 3 TO 5, INCLUSIVE, CARBON ATOMS IN A RATIO OF BETWEEN ABOUT 0.03 TO ABOUT 0.3 MOLE OF 1-OLEFIN MONOMER PER MOLE OF ETHYLENE WITH A CATALYST COMPOSITION CONSISTING ESSENTIALLY OF A TRIALKYL ALUMINUM COMPOUND WHEREIN THE ALKYL GROUPS OF THE SAID ALUMINUM COMPOUND HAVE FROM ABOUT 1 TO 8 CARBON ATOMS AND PURPLE TITANIUM TRICHLORIDE IN THE PRESENCE OF AN INERT NON-POLAR SOLVENT FOR THE MONOMERS AT A TEMPERATURE BETWEEN ABOUT 110*C. AND 140*C.
References Cited (Backward Citations)
BE552194A
Cited
US2825721A
Cited
US2905645A
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US2862917A
Cited
GB822993A
Cited
GB836333A
Cited
US3050471A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |