US3708284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of converting metal powder into bar stock
Assignee: United States Steel Corp
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Filing: 1970-01-26
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Granted: 1973-01-02
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Expires: 1990-01-26
Abstract
Abstract A METHOD AND APPARATUS FOR PRODUCING ROD-SHAPED METAL COMPACTS IN WHICH THE POWDER CHARGE IS FED UNDER VACUUM INTO A CONTINUOUSLY FORMED JACKETING TUBE. THE JACKETING CORE IN THEN HOT ROLLED TO FORM THE SINTER COM- PACT; THE AXIAL PULL OF THE ROLLING OPERATION PREVENTING THE BULGING OF TUBE JACKET. THE JACKET IS THEN REMOVED CHEMICALLY OR BY MACHINING.
Inventors
- 👤 H Chao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:35
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/18; B22F2998/00; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5185; Y10T29/5199
Claims Analysis
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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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |