US2446221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing aluminum halides by the reaction of alumina, carbon, and free halogen
Assignee: Standard Oil Development Co
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Filing: 1943-03-06
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Granted: 1948-08-03
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Expires: 1963-03-06
Abstract
No abstract record available.
Inventors
- 👤 Robert P Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:56
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/48; C01F7/56; C01F7/58; C01F7/60; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 0
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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) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |