US3843355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for melting and purifying magnesium
Assignee: Dow Chemical Co
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Filing: 1972-04-04
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Granted: 1974-10-22
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Expires: 1992-04-04
Abstract
Abstract 1. A METHOD COMPRISING SEQUENTIALLY MELTING MAGNESIUM HAVING NONMETALLIC CONTAMINANTS IN A SLAT FLUX FREE, PROTECTIVE GAS ATMOSPHERE, MELTING MEANS WITH WALL PORTIONS DEFINING AT LEAST ONE HOLE THERETHROUGH, THE HOLE BEING OF SUFFICIENT SIZE AND CONFIGURATION TO RETAIN NONMETALLIC CONTAMINANTS WITHIN THE MELTING MEANS; FLOWING THE MOLTEN MAGNESIUM THROUGH THE HOLE FROM THE MELTING MEANS INTO AN ADJACENT HOLDING MEANS AND RETAINING NONMETALLIC CONTAMINANTS WITHIN THE MELTING MEANS; AND REMOVING THE MOLTEN MAGNESIUM FROM THE HOLDING MEANS.
Inventors
- 👤 J Reding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:59
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/0025; F27D3/0026; C; C22; C22B; C22B26/00; C22B26/20; C22B26/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
A METHOD COMPRISING SEQUENTIALLY MELTING MAGNESIUM HAVING NONMETALLIC CONTAMINANTS IN A SLAT FLUX FREE, PROTECTIVE GAS ATMOSPHERE, MELTING MEANS WITH WALL PORTIONS DEFINING AT LEAST ONE HOLE THERETHROUGH, THE HOLE BEING OF SUFFICIENT SIZE AND CONFIGURATION TO RETAIN NONMETALLIC CONTAMINANTS WITHIN THE MELTING MEANS; FLOWING THE MOLTEN MAGNESIUM THROUGH THE HOLE FROM THE MELTING MEANS INTO AN ADJACENT HOLDING MEANS AND RETAINING
Claim 2
Independent Claim
62 words
A METHOD COMPRISING SEQUENTIALLY MELTING MAGNESIUM HAVING NONMETALLIC CONTAMINANTS IN A SLAT FLUX FREE, PROTECTIVE GAS ATMOSPHERE, MELTING MEANS WITH WALL PORTIONS DEFINING AT LEAST ONE HOLE THERETHROUGH, THE HOLE BEING OF SUFFICIENT SIZE AND CONFIGURATION TO RETAIN NONMETALLIC CONTAMINANTS WITHIN THE MELTING MEANS; FLOWING THE MOLTEN MAGNESIUM THROUGH THE HOLE FROM THE MELTING MEANS INTO AN ADJACENT HOLDING MEANS AND RETAINING
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |