US3810757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of elongated metallurgical mill product from loose metal powder
Assignee: Copper Range Co
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Filing: 1972-07-14
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Granted: 1974-05-14
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Expires: 1992-07-14
Abstract
Abstract A COPER BASE CONTINUOUS MILL SHAPE IS PRODUCED BY THE STEPS OF ADVANCING A COPPER BASE POWDER HAVING AN INITIAL DENSITY ON A SUPPORT THROUGH A HEATING ZONE IN A REDUCING ATMOSHPERE IN ORDER TO SINTER SUCCESSIVE INCREMENTS OF THE POWDER FOR A SUFFICIENTLY LONG PERIOD TO PRODUCE A SELFSUPPORTING INTERMEDIATE SHAPE HAVING A HIGHER DENSITY, AND ADVANCING THE INTERMEDIATE SHAPE IN A SINGLE PASS THROUGH A WORKING ZONE THAT REDUCES ONE OR TWO DIMENSIONS TO PRODUCE AN ELONGATED SHAPE HAVING AT LEAST 90% THERORETICAL DENSITY.
Inventors
- 👤 H Andrews
- 👤 D Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:38
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/18
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |