US2827446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene
Assignee: Hercules Powder Co
•
Filing: 1955-09-27
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Granted: 1958-03-18
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Expires: 1975-09-27
Abstract
No abstract record available.
Inventors
- 👤 David S Breslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:58
CPC Classifications
C; C08; C08F; C08F110/00; C08F110/02; Y; Y10; Y10S; Y10S260/00; Y10S260/25
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A CATALYST FORMED BY MIXING A BIS(CYCLOPENTADIENYL)TITANIUM SALT WHEREIN THE CYCLOPENTADIENYL MOIETY IS SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENYL AND ALKYCYCLOPENTADIENYL RADICALS WITH AN ALKYL METALLIC COMPOUND OF A METAL HAVING AN ATOMIC NUMBER WITHIN THE RANGE OF 3 TO 56 AND SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS I-A, II-A, II-B AND III-A OF THE PERIODIC TABLE,
Claim 2
Dependent Claim
72 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A CATALYST FORMED BY MIXING A BIS(CYCLOPENTADIENYL)TITANIUM SALT WHEREIN THE CYCLOPENTADIENYL MOIETY IS SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENYL AND ALKYCYCLOPENTADIENYL RADICALS WITH AN ALKYL METALLIC COMPOUND OF A METAL HAVING AN ATOMIC NUMBER WITHIN THE RANGE OF 3 TO 56 AND SELECTED FROM THE GROUP CONSISTING OF THE METALS OF GROUPS I-A, II-A, II-B AND III-A OF THE PERIODIC TABLE,
Claim 3
Dependent Claim
16 words
A POLYMERIZATION CATALYST COMPRISING THE PRODUCT FORMED BY REACTING A BIS(CYCLOPENTADIENYL)TITANIUM SALT WITH AN ALKYLALUMINUM COMPOUND.
Claim 4
Dependent Claim
16 words
A POLYMERIZATION CATALYST COMPRISING THE PRODUCT FORMED BY REACTING A BIS(CYCLOPENTADIENYL)TITANIUM SALT WITH AN ALKYLALUMINUM COMPOUND.
References Cited (Backward Citations)
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Cited
US2388178A
Cited
US2439765A
Cited
US2600654A
Cited
BE533362A
Cited
US2721189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-17 | 1961-09-16 | 1962-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-17 | 1965-09-16 | 1966-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-17 | 1969-09-16 | 1970-03-18 | $7700.00 | Window Closed / Lapsed |