Patent US3591349A successfully refreshed from Google Patents.
US3591349A
Expired / Lapsed
US
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High carbon tool steels by powder metallurgy
Assignee: Huntington Alloys Corp
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Filing: 1969-08-27
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Granted: 1971-07-06
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Expires: 1989-08-27
Abstract
Abstract THIS APPLICATION RELATES TO THE POWDER METALLURGY OF WROUGHT, HIGH CARBON TOOL STEELS AND ALSO TO A POWDER METALLURGY METHOD FOR PRODUCING SAID STEELS CHARACTERIZED METALLOGRAPHICALLY BY A UNIFORM DISTRIBUTION OF FINELY DIVIDED CARBIDES IN BOTH THE LONGITUDINAL AND TRANSVERSE DIRECTIONS.
Inventors
- 👤 John Stanwood Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:43
CPC Classifications
C; C22; C22C; 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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |