US3281238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of molten aluminous metal
Assignee: Alcoa Corp
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Filing: 1963-11-13
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Granted: 1966-10-25
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Expires: 1983-11-13
Abstract
No abstract record available.
Inventors
- 👤 Bachowski Ronald
- 👤 Paul D Hess
- 👤 Kenneth J Brondyke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:25
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/06; C22B21/066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
THE METHOD OF SIMULTANEOUSLY DEGASSING AND FILTERING MOLTEN ALUMINOUS METAL COMPRISING PASSING THE METAL CONTAINING HYDROGEN GAS AND IMPURITIES THROUGH A SUBMERGED BED OF PARTICLES OF FRESH POROUS CARBONACEOUS MATERIAL COMPOSED PRINCIPALLY OF CALCINED PETROLEUM COKE AND A CARBONIZED TAR OR PITCH BINDER, SAID PARTICLES HAVING A SIZE OF BETWEEN 0.5 AND 0.09 INCH, SAID BED HAVING A DEPTH OF NOT LESS THAN 4 INCHES, SAID METAL BEING PASSED THROUGH SAID BED AT A RATE OF NOT MORE THAN 150 POUNDS PER HOUR PER SQUARE INCH OF CROSS SECTION TAKEN IN A DIRECTION NORMAL TO THE DEPTH OF THE BED, AND RECOVERING THE PURIFIED METAL, WHEREBY THE HYDROGEN CONTENT OF THE METAL IS SUBSTANTIALLY REDUCED AND THE DENSITY OF THE SOLID METAL IS INCREASED.
Claim 2
Independent Claim
124 words
THE METHOD OF SIMULTANEOUSLY DEGASSING AND FILTERING MOLTEN ALUMINOUS METAL COMPRISING PASSING THE METAL CONTAINING HYDROGEN GAS AND IMPURITIES THROUGH A SUBMERGED BED OF PARTICLES OF FRESH POROUS CARBONACEOUS MATERIAL COMPOSED PRINCIPALLY OF CALCINED PETROLEUM COKE AND A CARBONIZED TAR OR PITCH BINDER, SAID PARTICLES HAVING A SIZE OF BETWEEN 0.5 AND 0.09 INCH, SAID BED HAVING A DEPTH OF NOT LESS THAN 4 INCHES, SAID METAL BEING PASSED THROUGH SAID BED AT A RATE OF NOT MORE THAN 150 POUNDS PER HOUR PER SQUARE INCH OF CROSS SECTION TAKEN IN A DIRECTION NORMAL TO THE DEPTH OF THE BED, AND RECOVERING THE PURIFIED METAL, WHEREBY THE HYDROGEN CONTENT OF THE METAL IS SUBSTANTIALLY REDUCED AND THE DENSITY OF THE SOLID METAL IS INCREASED.
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) | 1969-10-24 | 1970-04-25 | 1970-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-24 | 1974-04-25 | 1974-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-24 | 1978-04-25 | 1978-10-25 | $7700.00 | Window Closed / Lapsed |