US2741557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the deoxidation of copper
Assignee: Aurubis AG
•
Filing: 1953-01-30
•
Granted: 1956-04-10
•
Expires: 1973-01-30
Abstract
No abstract record available.
Inventors
- 👤 Wolf Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:17
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PROCESS FOR DEOXIDIZING OXYGEN CONTAINING MOLTEN COPPER AND COPPER ALLOYS, WHICH COMPRISES MAINTAINING THE MOLTEN METAL IN A FURANCE UNDER A REDUCING ATMOSPHERE CONTAINING AT LEAST 5% OF CO+H2 AND IN DIRECT CONTACT THEREWITH, WHILE SIMULTANEOUSLY INTRODUCING AN INERT GAS INTO THE MOLTEN METAL TO EFFECT INTENSIVE STIRRING THEREOF.
Claim 2
Dependent Claim
50 words
A PROCESS FOR DEOXIDIZING OXYGEN CONTAINING MOLTEN COPPER AND COPPER ALLOYS, WHICH COMPRISES MAINTAINING THE MOLTEN METAL IN A FURANCE UNDER A REDUCING ATMOSPHERE CONTAINING AT LEAST 5% OF CO+H2 AND IN DIRECT CONTACT THEREWITH, WHILE SIMULTANEOUSLY INTRODUCING AN INERT GAS INTO THE MOLTEN METAL TO EFFECT INTENSIVE STIRRING THEREOF.
References Cited (Backward Citations)
US1756967A
Cited
US2058947A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |