US3027308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of quenching metal articles
Assignee: National Steel Corp
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Filing: 1959-06-02
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Granted: 1962-03-27
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Expires: 1979-06-02
Abstract
No abstract record available.
Inventors
- 👤 Bruno P Zulkoski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:02
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56; C21D9/573
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
IN A METHOD OF QUENCHING A METAL ARTICLE HAVING FIRST AND SECOND FACES REQUIRING LIQUID QUENCHING MEDIUM AT A LOW TEMPERATURE AND A HIGHER TEMPERATURE RESPECTIVELY FOR QUENCHING WITHOUT FORMATION OF QUENCHING IMPERFECTIONS, THE METAL ARTICLE BEING QUENCHED IN A BODY OF LIQUID QUENCHING MEDIUM HAVING A TEMPERATURE TOO HIGH FOR QUENCHING THE FIRST FACE WITHOUT FORMATION OF QUENCHING IMPERFECTIONS, THE IMPROVEMENT WHICH COMPRISES PASSING THE METAL ARTICLE INTO THE BODY OF QUENCHING MEDIUM AND SUBSTANTIALLY IMMEDIATELY THEREAFTER IMPINGING COOL LIQUID QUENCHING MEDIUM ON AN IMMERSED PORTION OF THE FIRST FACE, THE COOL QUENCHING MEDIUM HAVING A TEMPERATURE AT LEAST AS LOW AS REQUIRED FOR QUENCHING OF THE FIRST FACE WITHOUT FORMATION OF QUENCHING IMPERFECTIONS AND BEING IMPINGED THEREON IN A VOLUME WHEREBY QUENCHING MEDIUM CONTACTING THE FIRST FACE AS IT ENTERS THE BODY OF QUENCHING MEDIUM IS MAINTAINED AT THE TEMPERATURE REQUIRED FOR QUENCHING THE FIRST FACE WITHOUT FORMATION OF QUENCHING IMPERFECTIONS.
Claim 2
Dependent Claim
153 words
IN A METHOD OF QUENCHING A METAL ARTICLE HAVING FIRST AND SECOND FACES REQUIRING LIQUID QUENCHING MEDIUM AT A LOW TEMPERATURE AND A HIGHER TEMPERATURE RESPECTIVELY FOR QUENCHING WITHOUT FORMATION OF QUENCHING IMPERFECTIONS, THE METAL ARTICLE BEING QUENCHED IN A BODY OF LIQUID QUENCHING MEDIUM HAVING A TEMPERATURE TOO HIGH FOR QUENCHING THE FIRST FACE WITHOUT FORMATION OF QUENCHING IMPERFECTIONS, THE IMPROVEMENT WHICH COMPRISES PASSING THE METAL ARTICLE INTO THE BODY OF QUENCHING MEDIUM AND SUBSTANTIALLY IMMEDIATELY THEREAFTER IMPINGING COOL LIQUID QUENCHING MEDIUM ON AN IMMERSED PORTION OF THE FIRST FACE, THE COOL QUENCHING MEDIUM HAVING A TEMPERATURE AT LEAST AS LOW AS REQUIRED FOR QUENCHING OF THE FIRST FACE WITHOUT FORMATION OF QUENCHING IMPERFECTIONS AND BEING IMPINGED THEREON IN A VOLUME WHEREBY QUENCHING MEDIUM CONTACTING THE FIRST FACE AS IT ENTERS THE BODY OF QUENCHING MEDIUM IS MAINTAINED AT THE TEMPERATURE REQUIRED FOR QUENCHING THE FIRST FACE WITHOUT FORMATION OF QUENCHING IMPERFECTIONS.
References Cited (Backward Citations)
US2420377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-26 | 1965-09-25 | 1966-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-26 | 1969-09-25 | 1970-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-26 | 1973-09-25 | 1974-03-27 | $7700.00 | Window Closed / Lapsed |