Patent EP0581233A1 successfully refreshed from Google Patents.
US2941910A
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US
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Method for heat treating steel piercer points
Assignee: Selas Corp of America
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Filing: 1958-01-24
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Granted: 1960-06-21
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Expires: 1978-01-24
Abstract
No abstract record available.
Inventors
- 👤 Charles A Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:19
CPC Classifications
B; B21; B21C; B21C25/00; B21C25/04; B21B; B21B25/00; C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/10; C23C8/16; C23C8/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF HEAT TREATING AN ALLOY STEEL PIERCER POINT WHICH COMPRISES PLACING THE STEEL DIRECTLY IN AN ATMOSPHERE AT HIGH TEMPERATURE THAT HAS NO FREE OXYGEN AND HEATING THE STEEL TO A TEMPERATURE WITHIN THE RANGE OF 200*F. TO 2200*F. IN FROM FIVE TO SEVEN MINUTES, SOAKING THE PIERCER POINT AT THE TEMPERATURE TO WHICH IT WAS HEATED AND THE SAME ATMOSPHERE FOR FROM 45 TO 120 MINUTES, COOLING THE PIERCER POINT IN AIR TO THEREBY PRODUCE A TIGHTLY ADHERENT SCALE ON THE SURFACE THERE OF.
Claim 2
Independent Claim
87 words
THE METHOD OF HEAT TREATING AN ALLOY STEEL PIERCER POINT WHICH COMPRISES PLACING THE STEEL DIRECTLY IN AN ATMOSPHERE AT HIGH TEMPERATURE THAT HAS NO FREE OXYGEN AND HEATING THE STEEL TO A TEMPERATURE WITHIN THE RANGE OF 200*F. TO 2200*F. IN FROM FIVE TO SEVEN MINUTES, SOAKING THE PIERCER POINT AT THE TEMPERATURE TO WHICH IT WAS HEATED AND THE SAME ATMOSPHERE FOR FROM 45 TO 120 MINUTES, COOLING THE PIERCER POINT IN AIR TO THEREBY PRODUCE A TIGHTLY ADHERENT SCALE ON THE SURFACE THERE OF.
References Cited (Backward Citations)
US2576782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |