US2493391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering scrap metal
Assignee: Alcoa Corp
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Filing: 1947-01-25
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Granted: 1950-01-03
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Expires: 1967-01-25
Abstract
No abstract record available.
Inventors
- 👤 Frank D Chew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:41
CPC Classifications
C; C22; C22B; C22B7/00; C22B1/00; C22B1/005; C25; C25C; C25C3/00; C25C3/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A PROCESS FOR RECLAIMING METAL VALUES FROM FINELY DIVIDED OXIDIZABLE METAL SCRAP CONTAMINATED WITH OIL CONSISTING IN FORMING A MELT OF METAL IN A FURANCE, POSITIVELY AND PROGRESSIVELY BRINGING THE SAID SCRAP INTO AND THROUGH A ZONE ABOVE SAID MELT OUT OF CONTACT WITH THE FURNACE ATMOSPHERE HEATED TO A SUFFICIENTLY HIGH TEMPERATURE TO VAPORIZE THE OIL, WITHDRAWING AT LEAST A PORTION OF SAID OIL VAPOR AND LIQUID CONDENSED THEREFROM ADJACENT THE UPPER END OF SAID HEATED ZONE BUT BELOW THE TOP OF THE SCRAPE CHARGE AND PASSING SAID SCRAP FROM SAID ZONE INTO AND BELOW THE SURFACE OF THE MOLTEN METAL WITHOUT CONTACT WITH THE FURANCE ATMSPHERE.
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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |