US3574138A
Expired / Lapsed
US
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Catalysts
Assignee: Individual
•
Filing: 1957-11-26
•
Granted: 1971-04-06
•
Expires: 1977-11-26
Abstract
Abstract CATALYST FOR POLYMERIZING OLEFINS SUCH AS ETHYLENE AND ITS HOMOLOGUES IN THE FORM OF THE PRODUCT OBTAINED UPON MIXING AN ALUMINUM TRIARYL OR ARALKYL WITH A SALT, FRESHLY PRECIPITATED OXIDE OR HYDROXIDE OF A METAL OF GROUP IV-B,V-B OR VI-B OF THE PERIODIC SYSTEM, INCLUDING THORIUM OR URANIUM. PREFERABLE SALTS ARE HALIDES, SUCH AS TITANIUM CHLORIDE OR ZIRCONIUM CHLORIDE.
Inventors
- 👤 Ziegler Karl
- 👤 Briel Heinz
- 👤 Holzkamp Erhard
- 👤 Martin Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:11
CPC Classifications
H; H01; H01J; H01J13/00; H01J13/02; H01J13/04; H01J13/06; H01J13/10; B; B65; B65G; B65G65/00; C; C08; C08F; C08F10/00; C08F110/00; C08F110/02; C08F36/00; C08F36/02; C08F6/00; C08F6/02; C10; C10M; C10M159/00; C10M159/12; C10M159/20; C10M159/22; D; D01; D01D; D01D1/00; D01D1/06; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/02; D01F6/04; H01B; H01B11/00; H01B11/18; H01B11/1834; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B7/00; H01B7/14; H01B7/17; H01B7/28; B65G2814/00; B65G2814/03; B65G2814/0301; B65G2814/0314; B65G2814/0316; B65G2814/0317; F; F02; F02B; F02B3/00; F02B3/06; H01J2893/00; H01J2893/0072; H01J2893/0073; H01J2893/0074; H01J2893/0075; H01J2893/0078; Y; Y02; Y02A; Y02A30/00; Y02A30/14; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 0
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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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |