US3071460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stainless steel composition
Assignee: Armco Inc
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Filing: 1959-11-20
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Granted: 1963-01-01
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Expires: 1979-11-20
Abstract
No abstract record available.
Inventors
- 👤 Tanczyn Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:19
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A CHROMIUM-NICKEL-ALUMINUM STAINLESS STEEL SUSCEPTIBLE TO PRECIPITATION-HARDENING BY DOUBLE HEAT-TREATMENT FROM A SOFT, WORKABLE, AUSTENITIC CONDITION, SAID STEEL CONSISTING ESSENTIALLY OF 14.00% TO 21.00% CHROMIUM, 2.50% TO 8.00% NICKEL, .70% TO 2.50% ALUMINUM, .10% TO .40% NITROGEN, CARBON .03% MAXIMUM, MANGANESE 8.00% MAXIMUM, WITH MANGANESE BEING INVERSELY PROPORTIONED WITH RESPECT TO THE NICKEL CONTENT, COPPER 5.00% MAXIMUM, SILICON 2.00% MAXIMUM, PHOSPHORUS .050% MAXIMUM, SULPHUR .050% MAXIMUM, AND REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
71 words
A CHROMIUM-NICKEL-ALUMINUM STAINLESS STEEL SUSCEPTIBLE TO PRECIPITATION-HARDENING BY DOUBLE HEAT-TREATMENT FROM A SOFT, WORKABLE, AUSTENITIC CONDITION, SAID STEEL CONSISTING ESSENTIALLY OF 14.00% TO 21.00% CHROMIUM, 2.50% TO 8.00% NICKEL, .70% TO 2.50% ALUMINUM, .10% TO .40% NITROGEN, CARBON .03% MAXIMUM, MANGANESE 8.00% MAXIMUM, WITH MANGANESE BEING INVERSELY PROPORTIONED WITH RESPECT TO THE NICKEL CONTENT, COPPER 5.00% MAXIMUM, SILICON 2.00% MAXIMUM, PHOSPHORUS .050% MAXIMUM, SULPHUR .050% MAXIMUM, AND REMAINDER SUBSTANTIALLY ALL IRON.
References Cited (Backward Citations)
US2505763A
Cited
US2892702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |