US2955062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for carburizing in a continuous furnace
Assignee: Midland Ross Corp
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Filing: 1956-03-29
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Granted: 1960-10-04
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Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Orville E Cullen
- 👤 John E Conley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:40
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20; C23C8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
198 words
A CONTINOUS METHOD FOR CARBURIZING FERROUS METAL WORK TO A SURFACE CARBON CONTENT OF X PERCENT WHEREIN X IS FROM 0.60 PERCENT TO 1.00 PERCENT WHICH COMPRISES PASSING THE WORK, SUCCESSIVELY, FIRST THROUGH A CARBURIZING ZONE WHOSE TEMPERATURE IS CONTROLLED TO PROVIDE A SUBSTANTIALLY CONSTANT TEMPERATURE WITHIN THE AUSTENITIC RANGE OF THE WORK IN A CARBURIZING REGION WITHIN THE CARBURIZING ZONE, AND THEN THROUGH A DIFFUSION ZONE WHOSE TEMPERATURE IS CONTROLLED TO PROVIDE A TEMPERATURE WITHIN THE AUSTENITIC RANGE OF THE WORK IN AT LEAST A PORTION OF THE DIFFUSING ZONE, PASSING THROUGH THE CARBURIZING ZONE, SUBSTANTIALLY COUNTERCURRENT TO THE WORK, AN ATMOSPHERE HAVING A CARBON POTENTIAL, AT THE TEMPERATURE OF THE CARBURIZING REGION OF FROM 1.00 PERCENT TO 1.40 PERCENT, PASSING THROUGH THE DIFFUSING ZONE, IN THE DIRECTION OF WORK TRAVEL, AN ATMOSPHERE HAVING A CARBON POTENTIAL, AT THE TEMPERATURE OF THE DIFFUSING ZONE, NOT GREATER THAN X PERCENT AND NOT LESS THAN THE CARBON CONTENT OF THE INTERIOR OF THE WORK, AND REGULATING THE RATE OF WORK TRAVEL TO PROVIDE RESIDENCE TIMES OF FROM 2 TO 14 HOURS IN THE CARBURIZING REGION OF THE CARBURIZING ZONE, AND FROM 1/2 TO 6 HOURS IN THE DIFFUSING ZONE.
Claim 2
Dependent Claim
198 words
A CONTINOUS METHOD FOR CARBURIZING FERROUS METAL WORK TO A SURFACE CARBON CONTENT OF X PERCENT WHEREIN X IS FROM 0.60 PERCENT TO 1.00 PERCENT WHICH COMPRISES PASSING THE WORK, SUCCESSIVELY, FIRST THROUGH A CARBURIZING ZONE WHOSE TEMPERATURE IS CONTROLLED TO PROVIDE A SUBSTANTIALLY CONSTANT TEMPERATURE WITHIN THE AUSTENITIC RANGE OF THE WORK IN A CARBURIZING REGION WITHIN THE CARBURIZING ZONE, AND THEN THROUGH A DIFFUSION ZONE WHOSE TEMPERATURE IS CONTROLLED TO PROVIDE A TEMPERATURE WITHIN THE AUSTENITIC RANGE OF THE WORK IN AT LEAST A PORTION OF THE DIFFUSING ZONE, PASSING THROUGH THE CARBURIZING ZONE, SUBSTANTIALLY COUNTERCURRENT TO THE WORK, AN ATMOSPHERE HAVING A CARBON POTENTIAL, AT THE TEMPERATURE OF THE CARBURIZING REGION OF FROM 1.00 PERCENT TO 1.40 PERCENT, PASSING THROUGH THE DIFFUSING ZONE, IN THE DIRECTION OF WORK TRAVEL, AN ATMOSPHERE HAVING A CARBON POTENTIAL, AT THE TEMPERATURE OF THE DIFFUSING ZONE, NOT GREATER THAN X PERCENT AND NOT LESS THAN THE CARBON CONTENT OF THE INTERIOR OF THE WORK, AND REGULATING THE RATE OF WORK TRAVEL TO PROVIDE RESIDENCE TIMES OF FROM 2 TO 14 HOURS IN THE CARBURIZING REGION OF THE CARBURIZING ZONE, AND FROM 1/2 TO 6 HOURS IN THE DIFFUSING ZONE.
References Cited (Backward Citations)
US2287651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-04 | 1964-04-04 | 1964-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-04 | 1968-04-04 | 1968-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-04 | 1972-04-04 | 1972-10-04 | $7700.00 | Window Closed / Lapsed |