US3259528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength stainless steels
Assignee: Jones and Laughlin Steel Corp
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Filing: 1962-05-02
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Granted: 1966-07-05
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Expires: 1982-05-02
Abstract
No abstract record available.
Inventors
- 👤 Kurt M Carlsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A COOL REDUCED AUSTENITIC-MARTENSITIC STEEL HAVING A YIELD STRENGTH NOT LESS THAN ABOUT 250,000 P.S.I., SAID MARTENSITE BEING PRODUCED BY COLD REDUCING THE STEEL ABOUT 55%, CONSISTING OF ABOUT 3.5 TO ABOUT 6.5% NICKEL, ABOUT .05 TO ABOUT .15% CARBON, NOT MORE THAN 2% MANGANESE, NOT MORE THAN 1% SILICON, SUFFICIENT CHROMIUM TO RENDER THE STEEL AUSTENITIC IN THE ANNEALED CONDITION BUT NOT MORE THAN ABOUT 18%, AND THE BALANCE IRON AND INCIDENTAL IMPURITIES IN NORMAL AMOUNTS, THE CARBON CONTENT AND THE ADJUSTED NICKEL CONTENT, ADJSTED TO A CHROMIUM CONTENT OF 17.4% ON THE BASIS OF 1% NICKEL BEING EQUIVALENT TO 1.4% CHROMIUM, DEFINING A POINT FALLING WITHIN THE AREA A-B-C-D-E OF FIGURE 1.
Claim 2
Dependent Claim
114 words
A COOL REDUCED AUSTENITIC-MARTENSITIC STEEL HAVING A YIELD STRENGTH NOT LESS THAN ABOUT 250,000 P.S.I., SAID MARTENSITE BEING PRODUCED BY COLD REDUCING THE STEEL ABOUT 55%, CONSISTING OF ABOUT 3.5 TO ABOUT 6.5% NICKEL, ABOUT .05 TO ABOUT .15% CARBON, NOT MORE THAN 2% MANGANESE, NOT MORE THAN 1% SILICON, SUFFICIENT CHROMIUM TO RENDER THE STEEL AUSTENITIC IN THE ANNEALED CONDITION BUT NOT MORE THAN ABOUT 18%, AND THE BALANCE IRON AND INCIDENTAL IMPURITIES IN NORMAL AMOUNTS, THE CARBON CONTENT AND THE ADJUSTED NICKEL CONTENT, ADJSTED TO A CHROMIUM CONTENT OF 17.4% ON THE BASIS OF 1% NICKEL BEING EQUIVALENT TO 1.4% CHROMIUM, DEFINING A POINT FALLING WITHIN THE AREA A-B-C-D-E OF FIGURE 1.
References Cited (Backward Citations)
US3903386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |