Patent US3081287A successfully refreshed from Google Patents.
US3081287A
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Assignee: Eastman Kodak Co
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Filing: 1958-03-31
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Granted: 1963-03-12
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Wesley Jr Coover Harry
- 👤 Henry Shearer Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:14
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/14; C08F; C08F10/00; C08F110/00; C08F110/04; C08F110/06; C08F12/00; C08F12/02; C08F12/04; C08F12/06; C08F12/08; C08F36/00; C08F36/02; C08F36/04; C08F110/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
70 words
IN THE POLYMERIZATION OF A-OLEFINIC HYDROCARBON CONTAINING 3-10 CARBON ATOMS TO FORM SOLID CRYSTALLINE POLYMER, THE IMPROVEMENT WHICH COMPRISES CATALYZING THE POLYMERIZATION WITH A CATALYTIC MIXTURE OF AN ALKYL ALUMINUM DICHLORDE WHEREIN THE ALKYL RADICAL CONTAINS 1-12 CARBON ATOMS, A TITANIUM CHLORIDE AND TRIPHENYL PHOSPHINE, THE MOLAR RATIO OF ALKYL ALUMINUM DICHLORIDE TO TITANIUM CHLORIDE TO TRIPHENYL PHOSPHINE BEING WITININ THE RANGE OF 1 TO 2/.5 TO 2/0.1 TO 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |