Patent US2997384A successfully refreshed from Google Patents.
US2997384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating molten metal
Assignee: Georg Fischer AG
•
Filing: 1959-03-19
•
Granted: 1961-08-22
•
Expires: 1979-03-19
Abstract
No abstract record available.
Inventors
- 👤 Feichtinger Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:57
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0081; C21C5/00; C21C5/56; C21C5/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A METHOD OF TREATING MOLTEN METAL WHICH COMPRISES, REDUCING METAL TO A MOLTEN STATE, PASSING THE MOLTEN METAL IN A CONDITION OF FREE-FALL FROM THE TOP TO THE BOTTOM OF A VERTICALLY EXTENDING CONFINED SPACE, INTRODUCING A JET OF GASEOUS MATERIAL INTO THE CONFINED SPACE NEAR THE POINT OF ENTRY THEREIN OF THE MOLTEN METAL AND DIRECTING SAID JET LATERALLY OF THE CONFINED SPACE SO THAT THE PATH THEREOF INTERSECTS THE PATH OF MOVEMENT OF THE MOLTEN METAL, DELIVERING SAID GASEOUS MATERIAL AT SUFFICIENT PRESSURE TO BREAK UP THE FLOWING STREAM OF MOLTEN METAL INTO A PLURALITY OF SMALLER STREAMS THEREBY TO EXPOSE A GREATER SURFACE AREA OF THE MOLTEN METAL AND TO INTERMINGLE THE MOLTEN METAL WITH THE GASEOUS MATERIAL, COLLECTING THE MOLTEN METAL IN THE REGION OF THE BOTTOM OF SAID CONFINED SPACE, REMOVING GASES FROM SAID CONFINED SPACE NEAR THE BOTTOM THEREOF, AND RESTRICT-
Claim 2
Independent Claim
147 words
A METHOD OF TREATING MOLTEN METAL WHICH COMPRISES, REDUCING METAL TO A MOLTEN STATE, PASSING THE MOLTEN METAL IN A CONDITION OF FREE-FALL FROM THE TOP TO THE BOTTOM OF A VERTICALLY EXTENDING CONFINED SPACE, INTRODUCING A JET OF GASEOUS MATERIAL INTO THE CONFINED SPACE NEAR THE POINT OF ENTRY THEREIN OF THE MOLTEN METAL AND DIRECTING SAID JET LATERALLY OF THE CONFINED SPACE SO THAT THE PATH THEREOF INTERSECTS THE PATH OF MOVEMENT OF THE MOLTEN METAL, DELIVERING SAID GASEOUS MATERIAL AT SUFFICIENT PRESSURE TO BREAK UP THE FLOWING STREAM OF MOLTEN METAL INTO A PLURALITY OF SMALLER STREAMS THEREBY TO EXPOSE A GREATER SURFACE AREA OF THE MOLTEN METAL AND TO INTERMINGLE THE MOLTEN METAL WITH THE GASEOUS MATERIAL, COLLECTING THE MOLTEN METAL IN THE REGION OF THE BOTTOM OF SAID CONFINED SPACE, REMOVING GASES FROM SAID CONFINED SPACE NEAR THE BOTTOM THEREOF, AND RESTRICT-
References Cited (Backward Citations)
US92667A
Cited
US137025A
Cited
US336439A
Cited
US558947A
Cited
US1931144A
Cited
US2131031A
Cited
US2457083A
Cited
US2826489A
Cited
US2819160A
Cited
US2893715A
Cited
US2915380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-21 | 1965-02-20 | 1965-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-21 | 1969-02-20 | 1969-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-21 | 1973-02-20 | 1973-08-22 | $7700.00 | Window Closed / Lapsed |