US2695229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chrome-nickel hardenable stainless steel
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1950-10-28
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Granted: 1954-11-23
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Expires: 1970-10-28
Abstract
No abstract record available.
Inventors
- 👤 Claude M Sheridan
- 👤 William C Benzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:54
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A HIGHLY SUPERIOR STAINLESS STEEL ALLOY OF A MARTENSITIC TYPE THAT IS CHARACTERIZED BY ITS EXCEPTIONALLY HIGH ROOM TEMPERATURE RESISTANCE TO CORROSION AND PITTING ON A LONG-TERM BASIS FROM BOTH THE STANDPOINT OF ADIC AND COPPER CHLORIDE AND FRRIC CHLORIDE ATTACK, BY ITS ABILITY TO BE HARDENED TO A MINIMUM OF ABOUT 35 ROCKWELL C, AND BY ITS IMPROVED MECHANICAL PROPERTIES AT ELEVATED TEMPERTURES AND WHICH, WITH IRON AND INCIDENTAL IMPURITIES, CONTAINS AS ITS ESSENTIAL ELEMENTS CARBON, CHROMIUM, NICKEL AND MOLYBDENUM IN A CRITICALLY PROPORTIONED AND BALANCED RELATIONSHIP; THE ALLOYING ELEMENTS CONSISTING OF A HIGLY CRITICAL MAXIMUM CARBON CONTENT OF BELOW .10%, ABOUT 10 TO 17% CHROMIUM, ABOUT 1 TO 4% NICKEL, ABOUT 1 TO 4% MOLYBDENUM, AND UP TO A MAXIMUM OF ABOUT .50%, EACH OF SILICON AND MANGANESE.
Claim 2
Dependent Claim
130 words
A HIGHLY SUPERIOR STAINLESS STEEL ALLOY OF A MARTENSITIC TYPE THAT IS CHARACTERIZED BY ITS EXCEPTIONALLY HIGH ROOM TEMPERATURE RESISTANCE TO CORROSION AND PITTING ON A LONG-TERM BASIS FROM BOTH THE STANDPOINT OF ADIC AND COPPER CHLORIDE AND FRRIC CHLORIDE ATTACK, BY ITS ABILITY TO BE HARDENED TO A MINIMUM OF ABOUT 35 ROCKWELL C, AND BY ITS IMPROVED MECHANICAL PROPERTIES AT ELEVATED TEMPERTURES AND WHICH, WITH IRON AND INCIDENTAL IMPURITIES, CONTAINS AS ITS ESSENTIAL ELEMENTS CARBON, CHROMIUM, NICKEL AND MOLYBDENUM IN A CRITICALLY PROPORTIONED AND BALANCED RELATIONSHIP; THE ALLOYING ELEMENTS CONSISTING OF A HIGLY CRITICAL MAXIMUM CARBON CONTENT OF BELOW .10%, ABOUT 10 TO 17% CHROMIUM, ABOUT 1 TO 4% NICKEL, ABOUT 1 TO 4% MOLYBDENUM, AND UP TO A MAXIMUM OF ABOUT .50%, EACH OF SILICON AND MANGANESE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |