US3708285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of de-waxing,presintering and sintering powdered metal compacts
Assignee: Hertel Cutting Technologies Inc
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Filing: 1971-01-14
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Granted: 1973-01-02
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Expires: 1991-01-14
Abstract
Abstract IN THIS APPARATUS A DE-WAXING OPERATION IS PERFORMED IN HYDROGEN, AND THE SAME VESSEL IS USED FOR VACUUM SINTERING WITHOUT MOVING OF THE PART TO BE HEAT TREATED, AND IN ONE CONTINUOUS OPERATION.
Inventors
- 👤 G Scheyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:25
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/1017; B22F3/1021; B22F3/003
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) | 1976-01-02 | 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 |