US2568860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the carburization of ferrous metals
Assignee: EIDP Inc
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Filing: 1948-01-22
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Granted: 1951-09-25
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Expires: 1968-01-22
Abstract
No abstract record available.
Inventors
- 👤 Paul M Leininger
- 👤 Farrell Hugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:27
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/40; C23C8/42; C23C8/44; C23C8/46; C23C8/52; C23C8/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF CARBURIZING FERROUS METAL STRUCTURES WHICH COMPRISES IMMERSING SAID STRUCTURES IN A FUSED SALT BATH HAVING AN ACITIVE CARBURIZING ACTION ON FERROUS METALS, THE CARBURIZING ACTION OF WHICH IS PRODUCED BY INRORPORATING FINELY-DIVIDED CARBON IN A FUSED SALT HAVING A TEMPERATURE BETWEEN 1550* F. AND 1750* AND CONSISTING ESSENTIALLY OF AT LEAST ONE CARBONATE SELECTED FROM THE CLASS CONSISTING OF SOBONATE AND POTASSIUM CARBONATE AND AT LEAST ONE CHLORIDE SELECTED FROM THE CLASS COSISTING OF SODIUM CHLORIDE AND POTASSIUM CHLORIDE, AND PASSING INTO SAID BATH A GAS SELECTED FROM THE CLASS CONSISTING OF CARBON MONOXIDE AND IN INORGANIC OXYGEN-CONTAINING GAS WHICH REACTS WITH CARBON TO FORM CARBON MONOXIDE IN SAID FUSED BATH.
Claim 2
Dependent Claim
114 words
THE PROCESS OF CARBURIZING FERROUS METAL STRUCTURES WHICH COMPRISES IMMERSING SAID STRUCTURES IN A FUSED SALT BATH HAVING AN ACITIVE CARBURIZING ACTION ON FERROUS METALS, THE CARBURIZING ACTION OF WHICH IS PRODUCED BY INRORPORATING FINELY-DIVIDED CARBON IN A FUSED SALT HAVING A TEMPERATURE BETWEEN 1550* F. AND 1750* AND CONSISTING ESSENTIALLY OF AT LEAST ONE CARBONATE SELECTED FROM THE CLASS CONSISTING OF SOBONATE AND POTASSIUM CARBONATE AND AT LEAST ONE CHLORIDE SELECTED FROM THE CLASS COSISTING OF SODIUM CHLORIDE AND POTASSIUM CHLORIDE, AND PASSING INTO SAID BATH A GAS SELECTED FROM THE CLASS CONSISTING OF CARBON MONOXIDE AND IN INORGANIC OXYGEN-CONTAINING GAS WHICH REACTS WITH CARBON TO FORM CARBON MONOXIDE IN SAID FUSED BATH.
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) | 1954-09-24 | 1955-03-26 | 1955-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-09-24 | 1959-03-26 | 1959-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-09-24 | 1963-03-26 | 1963-09-25 | $7700.00 | Window Closed / Lapsed |