US2644798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxylated aluminum halide polymerization catalyst
Assignee: Standard Oil Development Co
•
Filing: 1948-06-26
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Granted: 1953-07-07
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Expires: 1968-06-26
Abstract
No abstract record available.
Inventors
- 👤 John D Calfee
- 👤 Charles A Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:27
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A POLYMERIZATIUON CATALYST CONSISTING ESSENTIALLY OF A HYDROXYLATED ALUMINUM HALIDE HAVING A MOLAR RATIO OF HALIDE TO ALUMINUM BETWEEN 2:1 AND 2.8:1, SAID HYDROXYLATED ALUMINUM HALIDE BEING IN SOLUTION IN A LOW-FREEZING ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF AKYL HALIDES HAVING 1 TO 3 CARBON ATOMS, CARBON DISULFIDE, AND ALIPHATIC HYDROCARBONS HAVING 2 TO 4 CARBON ATOMS.
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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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |