Patent US4929415A successfully refreshed from Google Patents.
US4929415A
Expired / Lapsed
US
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Method of sintering powder
Assignee: University of Kentucky Research Foundation
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Filing: 1988-03-01
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Granted: 1990-05-29
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Expires: 2008-03-01
Abstract
Abstract A method for sintering and forming powder is disclosed. In this method a high voltage of 3 KV or more is applied to a mold filled with powder using an electrode which maintains a high current of 50 KA cm -2 or greater for a period of time from 10 to 500 microseconds. A device for practicing this method is also disclosed.
Inventors
- 👤 Kenji Okazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:26
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/105
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
44 words
A method for sintering powder, comprising applying a voltage of 3 KV or more to a mold filled with powder using an electrode which maintains a current of 50 KA cm -2 of greater for a period of time of 10 to 500 microseconds.
Claim 2
Independent Claim
44 words
A method for sintering powder, comprising applying a voltage of 3 KV or more to a mold filled with powder using an electrode which maintains a current of 50 KA cm -2 of greater for a period of time of 10 to 500 microseconds.
Claim 3
Dependent Claim
15 words
The method of claim 1, comprising using a voltage of from 3 to 30 KV.
Claim 4
Dependent Claim
29 words
The method of claim 1, comprising using, as said powder, an Al-Fe powder, an Al-Fe-Ce powder, an Al-Fe-Mo powder, an Al-Fe-V powder, an Fe-B-Si powder, or an Fe-Ni-B powder.
Claim 5
Dependent Claim
17 words
The method of claim 1, comprising using, as said powder, an Al-Fe-V powder, or an Al-Fe powder.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |