Patent US4275644A successfully refreshed from Google Patents.
Patent US2780541A successfully refreshed from Google Patents.
US2780541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating molten metals
Assignee: Individual
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Filing: 1954-04-09
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Granted: 1957-02-05
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Expires: 1974-04-09
Abstract
No abstract record available.
Inventors
- 👤 Zifferer Lothar Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:38
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
THE METHOD OF INOCULATING A FIRST METAL WITH A SECOND METAL WHICH COMPRISES IMMERSING AN ALLOY OF SAID SECOND METAL WITH A CARRIER METAL INTO A MOLTEN MASS OF THE FIRST METAL HEATED TO A TEMPERATURE ABOVE THE BOILING POINT OF SAID SECOND METAL, THE CARRIER METAL HAVING A MELTING TEMPERATURE LESS THAN SAID TEMPERATURE AND A BOILING TEMPERATURE GREATER THAN SAID TEMPERATURE, AND MAINTAINING SAID IMMERSION DURING THE INOCULATION OF THE FIRST METAL WITH THE RESULTING VAPORS OF SAID SECOND METAL WHILE PREVENTING SUBSTANTIAL MINGLING OF SAID CARRIER METAL WITH SAID MOLTEN MASS OF SAID FIRST METAL, THE PERCENTAGE OF SAID SECOND METAL IN THE ALLOY BEING SUFFICIENT TO PRODUCE A VAPOR PRESSURE IN EXCESS OF THE HYDROSTATIC HEAD OF SAID MOLTEN FIRST METAL AT THE POINT OF MAXIMUM IMMERSION.
Claim 2
Independent Claim
131 words
THE METHOD OF INOCULATING A FIRST METAL WITH A SECOND METAL WHICH COMPRISES IMMERSING AN ALLOY OF SAID SECOND METAL WITH A CARRIER METAL INTO A MOLTEN MASS OF THE FIRST METAL HEATED TO A TEMPERATURE ABOVE THE BOILING POINT OF SAID SECOND METAL, THE CARRIER METAL HAVING A MELTING TEMPERATURE LESS THAN SAID TEMPERATURE AND A BOILING TEMPERATURE GREATER THAN SAID TEMPERATURE, AND MAINTAINING SAID IMMERSION DURING THE INOCULATION OF THE FIRST METAL WITH THE RESULTING VAPORS OF SAID SECOND METAL WHILE PREVENTING SUBSTANTIAL MINGLING OF SAID CARRIER METAL WITH SAID MOLTEN MASS OF SAID FIRST METAL, THE PERCENTAGE OF SAID SECOND METAL IN THE ALLOY BEING SUFFICIENT TO PRODUCE A VAPOR PRESSURE IN EXCESS OF THE HYDROSTATIC HEAD OF SAID MOLTEN FIRST METAL AT THE POINT OF MAXIMUM IMMERSION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |