US2898327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-04-18
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Granted: 1959-08-04
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Expires: 1976-04-18
Abstract
No abstract record available.
Inventors
- 👤 Mcculloch William John Gilbert
- 👤 Jr Arthur W Langer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:27
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE PROCESS OF COPOLYMERIZXING ETHYLENE WITH ACETYLENE TO OBTAIN A COPOLYMER OF OMPROVED FLEXIBILITY AND TENSILE STRENGTH AND HAVING A MOLECULAR WEIGHT OF 10, 000 TO 100,000 WHICH COMPRISES CONTACTING THE ETHYLENE AND ACETYLENE AT POLYMERIZATION CONDITIONS WITH A CATALYST SYSTEM OF A REDUCIBLE TITANIUM HALIDE COMPOUND AND AN ALKYL ALUMINUM COMPOUND HAVING AT LEAST 2 ALKYL GROUPS, THE ACETYLENE BEING UTILIZED IN AN AMOUNT OF FROM 1000 TO 10,000 PARTS PER MILLION OF ETHYLENE FEED.
Claim 2
Dependent Claim
76 words
THE PROCESS OF COPOLYMERIZXING ETHYLENE WITH ACETYLENE TO OBTAIN A COPOLYMER OF OMPROVED FLEXIBILITY AND TENSILE STRENGTH AND HAVING A MOLECULAR WEIGHT OF 10, 000 TO 100,000 WHICH COMPRISES CONTACTING THE ETHYLENE AND ACETYLENE AT POLYMERIZATION CONDITIONS WITH A CATALYST SYSTEM OF A REDUCIBLE TITANIUM HALIDE COMPOUND AND AN ALKYL ALUMINUM COMPOUND HAVING AT LEAST 2 ALKYL GROUPS, THE ACETYLENE BEING UTILIZED IN AN AMOUNT OF FROM 1000 TO 10,000 PARTS PER MILLION OF ETHYLENE FEED.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |