US3004020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene polymerization using a mixture of metals and a halogen as catalyst
Assignee: Eastman Kodak Co
•
Filing: 1958-03-31
•
Granted: 1961-10-10
•
Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Howard S Young
- 👤 Charles W Hargis
- 👤 Reynolds Wayne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:47
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN THE POLYMERIZATION OF ETHYLENE TO FORM SOLID POLYMER, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE POLYMERIZATION AT A TEMPERATURE WITHIN THE RANGE OF 0 TO 250*C. IN THE PRESENCE OF A CATALYTIC MIXTURE INITIALLY CONSISTING ESSENTIALLY OF A TRANSITION METAL IN METALLIC FORM SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, ZIRCONIUM, CHROMIUM, AND MOLYBDENUM, A SECOND METAL IN METALLIC FORM SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC AND MAGNESIUM AND A HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, SAID CATALYTIC MIXTURE CONTAINING FROM 0.1 TO 10 ATOMS OF SECOND METAL PER ATOM OF TRANSITION METAL AND FROM 0.1 TO 10 ATOMS OF TRANSITION METAL PER MOLE OF HALOGEN.
Claim 2
Dependent Claim
114 words
IN THE POLYMERIZATION OF ETHYLENE TO FORM SOLID POLYMER, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE POLYMERIZATION AT A TEMPERATURE WITHIN THE RANGE OF 0 TO 250*C. IN THE PRESENCE OF A CATALYTIC MIXTURE INITIALLY CONSISTING ESSENTIALLY OF A TRANSITION METAL IN METALLIC FORM SELECTED FROM THE GROUP CONSISTING OF TITANIUM, VANADIUM, ZIRCONIUM, CHROMIUM, AND MOLYBDENUM, A SECOND METAL IN METALLIC FORM SELECTED FROM THE GROUP CONSISTING OF ALUMINUM, ZINC AND MAGNESIUM AND A HALOGEN SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, SAID CATALYTIC MIXTURE CONTAINING FROM 0.1 TO 10 ATOMS OF SECOND METAL PER ATOM OF TRANSITION METAL AND FROM 0.1 TO 10 ATOMS OF TRANSITION METAL PER MOLE OF HALOGEN.
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) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |