Patent US3069364A successfully refreshed from Google Patents.
US3069364A
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US
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Polyolefin synthesis
Assignee: Dal Mon Research Co
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Filing: 1957-11-04
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Granted: 1962-12-18
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Expires: 1977-11-04
Abstract
No abstract record available.
Inventors
- 👤 Aleiio Gaetano F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:19
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF PREPARING A CATALYST SUITABLE FOR THE POLYMERIZATION OD OLEFINS WHICH COMPRISES THE STEP OF GRINDING FOR AT LEAST ABOUT 48 HOURS AT ROOM TEMPERATURE AND AT AMBIENT TEMPERATURES A MIXTURE CONSISTING ESSENTIALLY OF ZR METAL WITH TICL2 UNDER INERT CONDITIONS, SAID TICL2 STARTING MATERIAL BEING INITIALLY SUBSTANTIALLY INEFFECTIVE FOR POLYMERIZING OLEFINS TO SOLID POLYMERS.
Claim 2
Independent Claim
57 words
THE METHOD OF PREPARING A CATALYST SUITABLE FOR THE POLYMERIZATION OD OLEFINS WHICH COMPRISES THE STEP OF GRINDING FOR AT LEAST ABOUT 48 HOURS AT ROOM TEMPERATURE AND AT AMBIENT TEMPERATURES A MIXTURE CONSISTING ESSENTIALLY OF ZR METAL WITH TICL2 UNDER INERT CONDITIONS, SAID TICL2 STARTING MATERIAL BEING INITIALLY SUBSTANTIALLY INEFFECTIVE FOR POLYMERIZING OLEFINS TO SOLID POLYMERS.
References Cited (Backward Citations)
US2899416A
Cited
FR1132506A
Cited
BE538782A
Cited
FR1134740A
Cited
US2905645A
Cited
US2893984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |