Patent US3573034A successfully refreshed from Google Patents.
US3573034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stress-corrosion resistant stainless steel
Assignee: Armco Inc
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Filing: 1967-09-18
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Granted: 1971-03-30
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Expires: 1987-09-18
Abstract
Abstract AUSTENITIC CHROMIUM-NICKEL STAINLESS STEEL OF HIGH CARBON CONTENT, AND VARIOUS PRODUCTS FASHIONED THEREOF, WHICH STEEL AND PRODUCTS ARE STRONG, DUCTILE AND WEARRESISTANT AND WHICH MOREOVER ARE RESISTANT TO THE ATTACK OF CHLORIDES IN APPLICATIONS WHERE GREAT STRESS IS ENCOUNTERED. MORE PARTICULARLY, THE STEEL COMPRISES ABOUT 18% TO ABOUT 25% CHROMIUM, ABOUT 9% TO ABOUT 20% NICKEL, ABOUT .25% TO ABOUT .85% CARBON, WITH CARBON BEING INVERSELY PROPORTIONED TO NICKEL, AND WITH REMAINDER SUBSTANTIALLY IRON.
Inventors
- 👤 Elbert E Denhard Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |