Patent US4204185A successfully refreshed from Google Patents.
Patent US3700435A successfully refreshed from Google Patents.
US3700435A
Expired / Lapsed
US
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Method for making powder metallurgy shapes
Assignee: Crucible Materials Corp
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Filing: 1971-03-01
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Granted: 1972-10-24
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Expires: 1991-03-01
Abstract
Abstract PRODUCTION OF POWDER METALLURGY SHAPES BY INTRODUCING A CHARGE OF POWDERED METAL TO BE COMPACTED TO A MOLD HAVING A CONFIGURATION CORRESPONDING GENERALLY TO THE DESIRED CONFIGURATION OF THE FINAL ARTICLE, PLACING THE MOLD IN A CONTAINER HAVING A SECONDARY PRESSURE MEDIA THEREIN AND SURROUNDING THE MOLD, HEATING THE ENTIRE ASSEMBLY TO AN ELEVATED TEMPERATURE FOR COMPACTING AND ISOTATICALLY COMPACTING THE POWDER BY THE APPLICATION OF FLUID PRESSURE WHITLE AT ELEVATE TEMPERAUTE.
Inventors
- 👤 Vijay Kumar Chandhok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:56
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |