US3157922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing castings of metals having high melting points
Assignee: WC Heraus GmbH and Co KG
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Filing: 1961-06-07
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Granted: 1964-11-24
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Expires: 1981-06-07
Abstract
No abstract record available.
Inventors
- 👤 Gruber Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:39
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/16; C22B9/22; C22B9/228; F; F27; F27B; F27B5/00; F27B5/04; Y; Y10; Y10S; Y10S164/00; Y10S164/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A METHOD OF PRODUCING CASTINGS OF METALS HAVING A MELTING TEMPERATURE OF AT LEAST ABOUT 2500*C. COMPRISING THE STEPS OF FILLING A WATER-COOLED CRUCIBLE IN A CHAMBER WITH AT LEAST ONE METAL, EVACUTATING SAID CHAMBER, BOMBARDING SAID METAL IN SAID CRUCIBLE DIRECTLY WITH A SERIES OF ELECTRON BEAMS EMITTED FROM SEVERAL ELECTRON SOURCES DISPOSED ABOVE SAID CRUCIBLE SO AS TO MELT THE METAL WHILE MAINTAINING A SKULL IN SAID CRUCIBLE, THEN TILTING SAID CRUCIBLE SO AS TO POUR THE MOLTEN METAL FROM SAID CRUCIBLE OVER A POURING LIP THEREOF INTO AT LEAST ONE MOLD, AND WHILE TILTING SAID CRUCIBLE AND POURING THE MOLTEN METAL, SUCCESSIVLEY SWITCHING OFF THE ELECTRON SOURCES IN THE DIRECTION TOWARD SAID POURING LIP SO AS TO PREVENT THE ELECTRON BEAMS FROM SAID SOURCES FROM STRIKING UPON THE CRUCIBLE ITSELF, AND SWITCHING ON AT LEAST ONE ADDITIONAL ELECTRON SOURCE DISPOSED IN A POSITION SO THAT THE ELECTRON BEAM EMITTING THEREFROM WILL STRIKE UPON THE MOLTEN METAL POURING FROM SAID CRUCIBLE INTO SAID MOLD.
Claim 2
Independent Claim
166 words
A METHOD OF PRODUCING CASTINGS OF METALS HAVING A MELTING TEMPERATURE OF AT LEAST ABOUT 2500*C. COMPRISING THE STEPS OF FILLING A WATER-COOLED CRUCIBLE IN A CHAMBER WITH AT LEAST ONE METAL, EVACUTATING SAID CHAMBER, BOMBARDING SAID METAL IN SAID CRUCIBLE DIRECTLY WITH A SERIES OF ELECTRON BEAMS EMITTED FROM SEVERAL ELECTRON SOURCES DISPOSED ABOVE SAID CRUCIBLE SO AS TO MELT THE METAL WHILE MAINTAINING A SKULL IN SAID CRUCIBLE, THEN TILTING SAID CRUCIBLE SO AS TO POUR THE MOLTEN METAL FROM SAID CRUCIBLE OVER A POURING LIP THEREOF INTO AT LEAST ONE MOLD, AND WHILE TILTING SAID CRUCIBLE AND POURING THE MOLTEN METAL, SUCCESSIVLEY SWITCHING OFF THE ELECTRON SOURCES IN THE DIRECTION TOWARD SAID POURING LIP SO AS TO PREVENT THE ELECTRON BEAMS FROM SAID SOURCES FROM STRIKING UPON THE CRUCIBLE ITSELF, AND SWITCHING ON AT LEAST ONE ADDITIONAL ELECTRON SOURCE DISPOSED IN A POSITION SO THAT THE ELECTRON BEAM EMITTING THEREFROM WILL STRIKE UPON THE MOLTEN METAL POURING FROM SAID CRUCIBLE INTO SAID MOLD.
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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) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |