US3091605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalyst pretreatment
Assignee: Eastman Kodak Co
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Filing: 1960-01-18
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Granted: 1963-05-28
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Expires: 1980-01-18
Abstract
No abstract record available.
Inventors
- 👤 David C Hull
- 👤 Jr Hugh J Hagemeyer
- 👤 Marvin B Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:36
CPC Classifications
C; C08; C08F; C08F10/00; B; B01; B01J; B01J23/00; B01J23/16; B01J37/00; B01J37/20; B01J23/20; B01J23/24; B01J23/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
IN THE POLYMERIZATION OF AN A-OLEFIN IN LIQUID ORGANIC MEDIUM BY MEANS OF A METAL OXIDE CATALYST EFFECTIVE TO POLYMERIZE SAID A-OLEFIN AND INCLUDING A REDUCED EXIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF GROUP 5A AND GROUP 6A OF THE PERIODIC TABLE, THE IMPROVEMENT WHICH COMPRISES, PRIOR TO POLYMERIZATION, EFFECTING REDUCTION OF THE METAL OXIDE CATALYST WITH HYDROGEN AT A TEMPERATURE IN THE RANGE OF ABOUT 400 TO ABOUT 700* C., COOLING SAID REDUCED OXIDE IN THE PRESENCE OF HYDROGEN, SLURRYING, IN THE ABSENCE OF HYDROGEN, SAID REDUCED METAL OXIDE IN A SOLVENT SUITABLE FOR THE POLYMERIZATION OF SAID A-OLEFIN, HEATING SAID SLURRY TO A TEMPERATURE IN TH RANGE OF ABOUT 200 TO ABOUT 300* C., AND DISTILLING OFF WATER WHICH FORMS.
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) | 1966-05-27 | 1966-11-26 | 1967-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-27 | 1970-11-26 | 1971-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-27 | 1974-11-26 | 1975-05-28 | $7700.00 | Window Closed / Lapsed |