US3728111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing billets from powder
Assignee: ABB Norden Holding AB
•
Filing: 1971-09-21
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Granted: 1973-04-17
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Expires: 1991-09-21
Abstract
Abstract FOR MANUFACTURING BILLETS OUT OF POWDER FOR FURTHER MACHINING BY ROLLING, FORGING OR MCAHINING, POWER IS POURED INTO A CONTAINER HAVING AN EVAUCATING OPENING AND IS THEN ISOSTATICALLY COMPRESSED BY SUBJECTING THE CONTAINER WITH THE ENCLOSED POWER TO A HIGH EXTREME PRESSURE. THE BILLET IS PLACED IN A HEATED FURNACE AND HEATED WHILE IT IS SIMULTANEOUSLY EVACUATED FOR DEGASSING. AFTER EVACUATION IS COMPLETED, THE BILLET IS PREHEATED IN ANOTHER FURNACE TO A TEMPERATURE SUITABLE FOR PRESSURE SINTERING AND THEN IN ANOTHER FURNACE IS SUBJECTED SIMULTANEOUSLY TO HIGH HEAT AND HIGH PRESSURE. D R A W I N G
Inventors
- 👤 I Stromblad
- 👤 S Isaksson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:10
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15
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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |