Patent US2900374A successfully refreshed from Google Patents.
US2900374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum halide catalysis of ethylene polymerization
Assignee: Individual
•
Filing: 1956-11-15
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Granted: 1959-08-18
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Expires: 1976-11-15
Abstract
No abstract record available.
Inventors
- 👤 Robert S Aries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:40
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES BUBBLING ETHYLENE INTO A SUSPENSION IN AN INERT ORGANIC SOLVENT OF A COMPLEX OF AN ALUMINUM HALIDE CONTAINING FROM ABOUT 0.00025 MOLES TO ABOUT 0.0067 MOLE PER MOLE OF ALUMINUM HALIDE OF AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF VANADIUM AND TITANIUM IN THE FORM OF HALIDES WITH FROM ABOUT 0.067 MOLE TO ABOUT 0.20 MOLE PER MOLE OF ALUMINUM HALIDE OF A HYDROCARBONSUBSTITUTED COMPOUND OF A TETRAVALENT METAL HAVING THE FORMULA M(R)N WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF TIN AND LEAD, R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL AND PHENYL, AND N IS AN INTEGER FROM 3 TO 4, THE METAL OF SAID METAL COMPOUND HAVING AT LEAST THREE OF ITS VALENCES CONNECTED TO HYDROCARBON RADICALS WITH ANY REMAINING VALENCES CONNECTED TO HALOGEN ATOMS.
Claim 2
Dependent Claim
141 words
THE PROCESS FOR POLYMERIZING ETHYLENE WHICH COMPRISES BUBBLING ETHYLENE INTO A SUSPENSION IN AN INERT ORGANIC SOLVENT OF A COMPLEX OF AN ALUMINUM HALIDE CONTAINING FROM ABOUT 0.00025 MOLES TO ABOUT 0.0067 MOLE PER MOLE OF ALUMINUM HALIDE OF AN ACTIVATOR SELECTED FROM THE GROUP CONSISTING OF VANADIUM AND TITANIUM IN THE FORM OF HALIDES WITH FROM ABOUT 0.067 MOLE TO ABOUT 0.20 MOLE PER MOLE OF ALUMINUM HALIDE OF A HYDROCARBONSUBSTITUTED COMPOUND OF A TETRAVALENT METAL HAVING THE FORMULA M(R)N WHEREIN M IS SELECTED FROM THE GROUP CONSISTING OF TIN AND LEAD, R IS A HYDROCARBON RADICAL SELECTED FROM THE GROUP CONSISTING OF ALKYL AND PHENYL, AND N IS AN INTEGER FROM 3 TO 4, THE METAL OF SAID METAL COMPOUND HAVING AT LEAST THREE OF ITS VALENCES CONNECTED TO HYDROCARBON RADICALS WITH ANY REMAINING VALENCES CONNECTED TO HALOGEN ATOMS.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |