Patent US3393997A successfully refreshed from Google Patents.
US3393997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for metallurgical treatment of molten metal, particularly iron
Assignee: Friedrich Kocks GmbH and Co
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Filing: 1966-07-06
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Granted: 1968-07-23
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Expires: 1986-07-06
Abstract
No abstract record available.
Inventors
- 👤 Faste Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:37
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/06; C21C7/064; C22; C22B; C22B15/00; C22B15/0026; C22B15/006; C22B9/00; C22B9/10; C22B9/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF METALLURGICALLY TREATING MOLTEN METAL IN A CENTRIFUGAL DRUM ROTATABLE ABOUT A HORIZONTAL OR INCLINED AXIS, WHICH COMPRISES THE STEPS OF CHARGING THE DRUM WITH THE MOLTEN METAL AND ROTATING THE DRUM AT CENTRIFUGAL SPEED SO AS TO FORM ON THE INNER PERIPHERY OF THE DRUM A HOLLOW ROTATIONAL CYLINDER OF MOLTEN METAL, THEN REDUCING THE DRUM ROTATION TO A SPEED AT WHICH GRAVITY PREDOMINATES OVER CENTRIFUGAL FORCE IN AN APEX REGION OF THE METAL CYLINDER SO THAT A SHOWER OF MOLTEN DROPLETS FALLS THROUGH THE INNER SPACE OF THE CYLINDER, AND
Claim 2
Independent Claim
94 words
THE METHOD OF METALLURGICALLY TREATING MOLTEN METAL IN A CENTRIFUGAL DRUM ROTATABLE ABOUT A HORIZONTAL OR INCLINED AXIS, WHICH COMPRISES THE STEPS OF CHARGING THE DRUM WITH THE MOLTEN METAL AND ROTATING THE DRUM AT CENTRIFUGAL SPEED SO AS TO FORM ON THE INNER PERIPHERY OF THE DRUM A HOLLOW ROTATIONAL CYLINDER OF MOLTEN METAL, THEN REDUCING THE DRUM ROTATION TO A SPEED AT WHICH GRAVITY PREDOMINATES OVER CENTRIFUGAL FORCE IN AN APEX REGION OF THE METAL CYLINDER SO THAT A SHOWER OF MOLTEN DROPLETS FALLS THROUGH THE INNER SPACE OF THE CYLINDER, AND
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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |