US3264095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for melting of metals to obtain utmost purity
Assignee: Magnetic Metals Corp
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Filing: 1962-10-29
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Granted: 1966-08-02
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Expires: 1982-10-29
Abstract
No abstract record available.
Inventors
- 👤 Friedrich W Ackermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:45
CPC Classifications
C; C22; C22B; C22B5/00; C22B4/00; C22B9/00; C22B9/04; C22B9/16; C22B9/20; F; F27; F27B; F27B5/00; F27B5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF PURIFYING A MAGNETIC METAL TO REDUCE TO A MINIMUM ITS IMPURITIES PARTICULARLY METALLIC OXIDES AND THEREBY INCREASE ITS PERMEABILITY TO A MAXIMUM COMPRISING THE STEPS OF, FORMING AN ELONGATE ELECTRODE OF THE METAL TO BE PURIFIED, MELTING SAID ELECTRODE AT A TEMPERATURE OF AT LEAST 400*F. IN A REDUCING ATMOSPHERE OF HYDROGEN AND WITH A PRESSURE OF ABOUT FIVE TO FIFTEEN MICRONS, AND FREEZING THE MOLTEN METAL IN A CRUCIBLE.
Claim 2
Independent Claim
73 words
THE METHOD OF PURIFYING A MAGNETIC METAL TO REDUCE TO A MINIMUM ITS IMPURITIES PARTICULARLY METALLIC OXIDES AND THEREBY INCREASE ITS PERMEABILITY TO A MAXIMUM COMPRISING THE STEPS OF, FORMING AN ELONGATE ELECTRODE OF THE METAL TO BE PURIFIED, MELTING SAID ELECTRODE AT A TEMPERATURE OF AT LEAST 400*F. IN A REDUCING ATMOSPHERE OF HYDROGEN AND WITH A PRESSURE OF ABOUT FIVE TO FIFTEEN MICRONS, AND FREEZING THE MOLTEN METAL IN A CRUCIBLE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |