US3355280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength, martensitic stainless steel
Assignee: Huntington Alloys Corp
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Filing: 1965-06-25
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Granted: 1967-11-28
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Expires: 1985-06-25
Abstract
No abstract record available.
Inventors
- 👤 Glenn W Tuffnell
- 👤 Frank W Schaller
- 👤 Ralph B G Yeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:11
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A STAINLESS STEEL HAVING A MARTENSITIC MICROSTRUCTURE WITH LESS THAN 5% DELTA FERRITE AND LESS THAN ABOUT 5% AUTENITE AND CHARACTERIZED BY A YIELD STRENGTH OF AT LENGTH 100,000 POUNDS PER SQUARE INCH, SAID STEEL CONSISTING ESSENTIALLY OF 13% TO 15% CHROMIUM, 4% TO 6% NICKEL, CARBON UP TO 0.12%, NITROGEN IN AN AMOUNT UP TO ABOUT 0.1%, THE SUM OF THE CARBON PLUS NITROGEN NOT EXCEEDING ABOUT 0.13%, UP TO ABOUT 1.5% MOLYBDENUM, UP TO ABOUT 1% MANGANESE, UP TO ABUT 1% SILICON, UP TO ABOUT 0.15% ALUMINUM, AND THE BALANCE ESSTENTIALLY 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) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |