US2843474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of pure aluminum
Assignee: ZIEGLER AG
•
Filing: 1955-08-02
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Granted: 1958-07-15
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Expires: 1975-08-02
Abstract
No abstract record available.
Inventors
- 👤 Ziegler Karl
- 👤 Gellert Hans-Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:15
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0038; C22B21/0053
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PROCESS FOR THE PRODUCTION OF PURE ALUMINUM FROM CRUDE ALUMINUM CONTAINING IMPURITIES WHICH COMPRISES FORMING AN ALUMINUM COMPOUND OF THE GENERAL FORMULA
Claim 2
Dependent Claim
23 words
A PROCESS FOR THE PRODUCTION OF PURE ALUMINUM FROM CRUDE ALUMINUM CONTAINING IMPURITIES WHICH COMPRISES FORMING AN ALUMINUM COMPOUND OF THE GENERAL FORMULA
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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |