Patent US2899413A successfully refreshed from Google Patents.
US2899413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aicls
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
2026-10-29 14:58
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN THE POLYMERIZATION OF AT LEAST ONE NORMALLY GASEOUS A-MONOOLEFIN TO FORM SOLID POLYMER, THE IMPROVEMENT IN PREPARING POLYMER OF EXCEPTIONAL CRYSTALLINITY AT INCREASED RATES WHICH COMPRISES EFFECTING THE POLYMERIZATION IN AN INERT ORGANIC LIQUID VEHICLE AT A TEMPERATURE OF 20-200* C. AND A PRESSURE OF 0-520,000 P.S.I.G. AND IN THE PRESENCE OF A CATALYTIC MIXTURE OF ALUMINUM METAL, ALUMINUM CHLORIDE, AN ALKALI METAL FLUORIDE AND A TITANIUM COMPOUND FROM THE GROUP CONSISTING OF TITANIUM TETRAHALIDES AND TITANUIN TETRAALKAXIDES WHEREIN EACH ALKOXIDE GROUP CONTAINS 1-8 CARBON ATOMS, SAID ALUMINUM CHLORIDE AMOUNTING TO 0.1-2 MOLAR EQUIVALENTS PER GRAM ATOM OF ALUMINUM METAL, SAID ALKALI METAL FLUORIDE AMOUNTING TO 1-10 MOLAR EQUIVALENTS PER GRAM ATOM OF ALUMINUM METAL, AND SAID TITANIUM COMPOUND AMOUNTING TO .01-10 MOLAR EQUIVALENTS PER GRAM ATOM OF ALUMINUM METAL.
Claim 2
Dependent Claim
131 words
IN THE POLYMERIZATION OF AT LEAST ONE NORMALLY GASEOUS A-MONOOLEFIN TO FORM SOLID POLYMER, THE IMPROVEMENT IN PREPARING POLYMER OF EXCEPTIONAL CRYSTALLINITY AT INCREASED RATES WHICH COMPRISES EFFECTING THE POLYMERIZATION IN AN INERT ORGANIC LIQUID VEHICLE AT A TEMPERATURE OF 20-200* C. AND A PRESSURE OF 0-520,000 P.S.I.G. AND IN THE PRESENCE OF A CATALYTIC MIXTURE OF ALUMINUM METAL, ALUMINUM CHLORIDE, AN ALKALI METAL FLUORIDE AND A TITANIUM COMPOUND FROM THE GROUP CONSISTING OF TITANIUM TETRAHALIDES AND TITANUIN TETRAALKAXIDES WHEREIN EACH ALKOXIDE GROUP CONTAINS 1-8 CARBON ATOMS, SAID ALUMINUM CHLORIDE AMOUNTING TO 0.1-2 MOLAR EQUIVALENTS PER GRAM ATOM OF ALUMINUM METAL, SAID ALKALI METAL FLUORIDE AMOUNTING TO 1-10 MOLAR EQUIVALENTS PER GRAM ATOM OF ALUMINUM METAL, AND SAID TITANIUM COMPOUND AMOUNTING TO .01-10 MOLAR EQUIVALENTS PER GRAM ATOM OF ALUMINUM METAL.
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 |