US3798202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin production
Assignee: Phillips Petroleum Co
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Filing: 1971-10-12
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Granted: 1974-03-19
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Expires: 1991-10-12
Abstract
Abstract A CATALYST AND A METHOD OF EMPLOYING THAT CATALYST ARE DISCLOSED, THE CATALYST BEING COMPRISED OF A MIXTURE OF TWO SUPPORTED CATALYSTS ACTIVE FOR OLEFIN POLYMERIZATION, THE CATALYSTS DIFFERING IN RESPECT TO THEIR TITANIUM CONTENTS.
Inventors
- 👤 B Nasser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:06
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |