US3225023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling melt index
Assignee: Phillips Petroleum Co
•
Filing: 1962-11-30
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Granted: 1965-12-21
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Expires: 1982-11-30
Abstract
No abstract record available.
Inventors
- 👤 Hogan John Paul
- 👤 Alonzo G Kitchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:34
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR OBTAINING A POLYMER OF REGULATED MELT INDEX OBTAINED BY POLYMERIZING A 1-OLEFIN IN A REACTION ZONE IN THE PRESENCE OF A SUPPORTED POLYMERIZATION CATALYST COMPRISING AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AT LEST A PORTION OF WHICH IS HEXAVALENT, NICKEL, VANADIUM, AND MOLBDENUM AND AS A SUPPORT AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA AND THORIA, WHICH
Claim 2
Dependent Claim
72 words
A PROCESS FOR OBTAINING A POLYMER OF REGULATED MELT INDEX OBTAINED BY POLYMERIZING A 1-OLEFIN IN A REACTION ZONE IN THE PRESENCE OF A SUPPORTED POLYMERIZATION CATALYST COMPRISING AN OXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AT LEST A PORTION OF WHICH IS HEXAVALENT, NICKEL, VANADIUM, AND MOLBDENUM AND AS A SUPPORT AT LEAST ONE OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICA, ALUMINA, ZIRCONIA AND THORIA, WHICH
References Cited (Backward Citations)
US2825721A
Cited
US3050514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |