US3013002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of ethylene with dicyclopentadienyl chromium-metal alkylcatalysts
Assignee: Hercules Powder Co
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Filing: 1960-04-05
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Granted: 1961-12-12
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Expires: 1980-04-05
Abstract
No abstract record available.
Inventors
- 👤 David S Breslow
- 👤 Wendell P Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/02; C08F110/00; C08F110/02; C08F210/00; C08F210/16; C08F4/00; C08F4/42; C08F4/44; C08F4/60; C08F4/62; C08F4/639; C08F4/63912; C08F4/6392; C08F4/63922; C08F4/63925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF A COMBINATION OF (1) A CYCLOPENTADIENYL COMPOUND OF THE FORMULA RC1R WHERE R IS SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENYL AND ALKYL CYCLOPENTADIENYL RADICALS, SAID ALKYL CYCLOPENTADIENYL RADICAL BEING SELECTED FROM THE GROUP CONSISTING OF METHYLCYCLOPENTADIENYL, DIMETHYLCYCLOPENTADIENYL, ETHYLCYCLOPENTADIENYL AND PROPYLCYCLOPENTADIENYL RADICALS, AND (2) AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, MAGNESIUM, ZINC, ALUMINUM AND BERYLLIUM WHEREIN ALL VALENCES OF THE METAL ARE SATISFIED BY ALKYL RADICALS, SAID CYCLOPENTADIENYL COMPOUND HAVING BEEN REACTED WITH AN APPROXIMATELY EQUIMOLAR AMOUNT OF OXYGEN DURING THE PREPARATION OF THE CATALYST.
Claim 2
Dependent Claim
108 words
THE PROCESS OF POLYMERIZING ETHYLENE WHICH COMPRISES CONTACTING ETHYLENE WITH A CATALYST CONSISTING ESSENTIALLY OF A COMBINATION OF (1) A CYCLOPENTADIENYL COMPOUND OF THE FORMULA RC1R WHERE R IS SELECTED FROM THE GROUP CONSISTING OF CYCLOPENTADIENYL AND ALKYL CYCLOPENTADIENYL RADICALS, SAID ALKYL CYCLOPENTADIENYL RADICAL BEING SELECTED FROM THE GROUP CONSISTING OF METHYLCYCLOPENTADIENYL, DIMETHYLCYCLOPENTADIENYL, ETHYLCYCLOPENTADIENYL AND PROPYLCYCLOPENTADIENYL RADICALS, AND (2) AN ORGANOMETALLIC COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF LITHIUM, SODIUM, MAGNESIUM, ZINC, ALUMINUM AND BERYLLIUM WHEREIN ALL VALENCES OF THE METAL ARE SATISFIED BY ALKYL RADICALS, SAID CYCLOPENTADIENYL COMPOUND HAVING BEEN REACTED WITH AN APPROXIMATELY EQUIMOLAR AMOUNT OF OXYGEN DURING THE PREPARATION OF THE CATALYST.
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |