US3168397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steel alloy
Assignee: Carpenter Steel Co
•
Filing: 1962-01-03
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Granted: 1965-02-02
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Expires: 1982-01-03
Abstract
No abstract record available.
Inventors
- 👤 Lawrence R Scharfstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:28
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/42; C22C19/00; C22C19/03; C22C19/05; C22C19/051; C22C19/053; C22C38/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A CORROSION RESISTANT AUSTENITIC STEEL ALLOY, CONSISTING ESSENTIALLY OF IN PERCENT BY WEIGHT: FROM 17.5% TO 26% CHROMIUM, FROM 32.5% TO 35% NICKEL, FROM 2% TO 3% MOLYBDENUM, FROM 3% TO 4% COPPER, WITHIN THE TOLERANCES OF GOOD MELTING PRACTICE, AND THE REMAINDER ESSENTIALLY IRON, SAID ALLOY BEING CHARACTERIZED BY FREEDOM FROM STRESS CORROSION CRACKING WHEN UNDER STRESS WHILE EXPOSED TO SULFURIC ACID.
Claim 2
Dependent Claim
63 words
A CORROSION RESISTANT AUSTENITIC STEEL ALLOY, CONSISTING ESSENTIALLY OF IN PERCENT BY WEIGHT: FROM 17.5% TO 26% CHROMIUM, FROM 32.5% TO 35% NICKEL, FROM 2% TO 3% MOLYBDENUM, FROM 3% TO 4% COPPER, WITHIN THE TOLERANCES OF GOOD MELTING PRACTICE, AND THE REMAINDER ESSENTIALLY IRON, SAID ALLOY BEING CHARACTERIZED BY FREEDOM FROM STRESS CORROSION CRACKING WHEN UNDER STRESS WHILE EXPOSED TO SULFURIC ACID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |