Patent US3000730A successfully refreshed from Google Patents.
US3000730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Free-machining stainless steel
Assignee: Armco Inc
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Filing: 1959-12-03
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Granted: 1961-09-19
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Expires: 1979-12-03
Abstract
No abstract record available.
Inventors
- 👤 Tanczyn Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:22
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
A QUENCH-HARDENABLE FREE-MACHINING STAINLESS STEEL IN WHICH THE RESPONSE TO TEMPERATING TREATMENT IS BROADENED, SAID STEEL ESSENTIALLY CONSISTING OF CARBON .07% TO .14% MANGANESE .10% TO 1.25%, INGREDIENT OF THE GROUP SULPHUR AND SELENIUM IN THE AMOUNT OF .07% TO .50%, SILICON .10% TO 1.00%, CHROMIUM 10.0% TO 14.0% NICKEL 1.00% MAXIMUM, INGREDIENT OF THE GROUP COLUMDIUMTANTALU, .03% TO .35%, AND VANADIUM .03% TO .50% MOLYBDENUM UO TO .60%, ZIRCONIUM UP TP .60%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
79 words
A QUENCH-HARDENABLE FREE-MACHINING STAINLESS STEEL IN WHICH THE RESPONSE TO TEMPERATING TREATMENT IS BROADENED, SAID STEEL ESSENTIALLY CONSISTING OF CARBON .07% TO .14% MANGANESE .10% TO 1.25%, INGREDIENT OF THE GROUP SULPHUR AND SELENIUM IN THE AMOUNT OF .07% TO .50%, SILICON .10% TO 1.00%, CHROMIUM 10.0% TO 14.0% NICKEL 1.00% MAXIMUM, INGREDIENT OF THE GROUP COLUMDIUMTANTALU, .03% TO .35%, AND VANADIUM .03% TO .50% MOLYBDENUM UO TO .60%, ZIRCONIUM UP TP .60%, AND THE REMAINDER SUBSTANTIALLY ALL IRON.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |