US3809541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vanadium-containing tool steel article
Assignee: Crucible Materials Corp
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Filing: 1972-10-24
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Granted: 1974-05-07
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Expires: 1992-10-24
Abstract
Abstract A VANADIUM-CONTAINING TOOL STEEL AND ARTICLE COMPACTED FROM PARTICLES THEREOF AND A METHOD FOR PRODUCING SAID ARTICLE FROM A PREALLOYED POWDERED CHARGE OF THE ALLOY CONSISTING ESSENTIALLY OF, IN WEIGHT PERCENT, CARBON 1.5 TO 1.6, CHROMIUM 3.5 TO 4.5, VANADIUM 2.5 TO 3.5 TUNGSTEN 9 TO 11, MOLYBDEMUM 4.5 TO 5.5, COBALT 8.0 TO 12.5, MANGANESE UP TO 1, SILICON UP TO 1, NITROGEN .02 TO .08 AND BALANCE IRON; THE ARTICLE IS CHARACTERIZED BY THE COMBINATION O HARDNESS AND TOUGHNESS MAKING IT DESIRABLE FOR CUTTING TOOL APPLICATIONS.
Inventors
- 👤 G Steven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:23
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/30; B; B22; B22F; B22F3/00; B22F3/12; B22F3/1208; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0285
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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |