US3046167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-treating method and product
Assignee: Armco Inc
•
Filing: 1960-05-19
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Granted: 1962-07-24
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Expires: 1980-05-19
Abstract
No abstract record available.
Inventors
- 👤 James H Waxweiler
- 👤 Jr Robert M Larrimore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:02
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44; C21; C21D; C21D9/00; C21D9/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF HEAT-TREATING WELDED AGE-HARDENABLE CHROMIUM-NICKEL STAINLESS STEEL TO IMPART THERETO, WHILE IN HARDENED CONDITION, A HIGH DEGREE OF BOTH DUCTILITY AND TOUGHNESS, WHICH METHOD COMPRISES THE SEQUENTIAL STEPS OF WELDING; TRANSFORMING THE WELDED PRODUCTS TO A STRUCTURE WHICH IS ESSENTIALLY MARTENSITIC BUT WHICH INCLUDES SOME FERRITE; THEREUPON RESTORING THE STEEL TO A STRUCTURE WHICH IS ESSENTIALLY AUSTENITIC ALTHOUGH CONTAINING SOME FERRITE, THROUGH ANNEALING AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO RE-AUSTENITIZE THE MARTENSITE AND FERRITE AND BREAK UP THE ORIGINAL CAST-WELD STRUCTURE; RE-TRANSFORMING THE METAL TO A STRUCTURE WHICH IS ESSENTIALLY MARTENSITIC, TOGETHER WITH VERY LITTLE FERRITE; AND FINALLY HARDENING THE METAL, THROUGH APPROPRIATE HEATTREATMENT, TO A CONDITION WHICH IS ESSENTIALLY ALL MARTENSITE.
Claim 2
Independent Claim
117 words
A METHOD OF HEAT-TREATING WELDED AGE-HARDENABLE CHROMIUM-NICKEL STAINLESS STEEL TO IMPART THERETO, WHILE IN HARDENED CONDITION, A HIGH DEGREE OF BOTH DUCTILITY AND TOUGHNESS, WHICH METHOD COMPRISES THE SEQUENTIAL STEPS OF WELDING; TRANSFORMING THE WELDED PRODUCTS TO A STRUCTURE WHICH IS ESSENTIALLY MARTENSITIC BUT WHICH INCLUDES SOME FERRITE; THEREUPON RESTORING THE STEEL TO A STRUCTURE WHICH IS ESSENTIALLY AUSTENITIC ALTHOUGH CONTAINING SOME FERRITE, THROUGH ANNEALING AT A TEMPERATURE AND FOR A TIME SUFFICIENT TO RE-AUSTENITIZE THE MARTENSITE AND FERRITE AND BREAK UP THE ORIGINAL CAST-WELD STRUCTURE; RE-TRANSFORMING THE METAL TO A STRUCTURE WHICH IS ESSENTIALLY MARTENSITIC, TOGETHER WITH VERY LITTLE FERRITE; AND FINALLY HARDENING THE METAL, THROUGH APPROPRIATE HEATTREATMENT, TO A CONDITION WHICH IS ESSENTIALLY ALL MARTENSITE.
References Cited (Backward Citations)
US2732323A
Cited
US2482098A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |