US2899415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coordination polymerization catalysts
Assignee: —
•
Filing: —
•
Granted: 1959-08-11
•
Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:24
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
THE PROCESS OF POLYMERIZING ETHYLENE TO FORM SOLID POLYMERS WHICH COMPRISES CONTACTING ETHYLENE AT A TEMPERATURE OF 0 TO 300*C. IN THE PRESENCE OF AN INERT ORGANIC SOLVENT WITH A CATALYST FORMED BY ADMIXING AN ALUMINUM COMPOUND OF THE CLASS CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM ETHOXIDE WITH ETHYL MAGNESIUM BROMIDE, THE MOLAR RATIO OF THE MAGNESIUM COMPOUND TO THE ALUMINUM COMPOUND BEING AT LEAST ONE.
Claim 2
Dependent Claim
66 words
THE PROCESS OF POLYMERIZING ETHYLENE TO FORM SOLID POLYMERS WHICH COMPRISES CONTACTING ETHYLENE AT A TEMPERATURE OF 0 TO 300*C. IN THE PRESENCE OF AN INERT ORGANIC SOLVENT WITH A CATALYST FORMED BY ADMIXING AN ALUMINUM COMPOUND OF THE CLASS CONSISTING OF ALUMINUM CHLORIDE AND ALUMINUM ETHOXIDE WITH ETHYL MAGNESIUM BROMIDE, THE MOLAR RATIO OF THE MAGNESIUM COMPOUND TO THE ALUMINUM COMPOUND BEING AT LEAST ONE.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |