Patent US4546089A successfully refreshed from Google Patents.
US4546089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Group 4b boride and VB2 /YB2
Assignee: Corning Inc
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Filing: 1982-12-30
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Granted: 1985-10-08
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Expires: 2002-12-30
Abstract
Abstract A powder sinterable (without necessarily hot pressing) to a density approaching theoretical density of its composition and to 0-5 volume % open porosity, which powder has a particle size substantially less than 5 μm and consisting of about 2 to 10 mole % of diboride of vanadium or yttrium, optionally very small amounts of oxygen and carbon, and the balance essentially diboride of Group 4b metal. The diborides can be in solid solution in the powder. The minor diborides are sintering aids.
Inventors
- 👤 Raja R. Wusirika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/58; C04B35/5805; C04B35/58064; C04B35/58078; C04B35/58071; C04B35/622; C04B35/64; C04B35/645
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
62 words
A sinterable powder having a particle size substantially less than 5 μm, consisting of about 2 to 10 mole % of diboride of vanadium or yttrium, optionally very small amounts of oxygen and carbon, and the balance diboride of Group 4b metal, and being sinterable into a body having density approaching theoretical density of the composition and 0-5 volume % open porosity.
Claim 2
Dependent Claim
62 words
A sinterable powder having a particle size substantially less than 5 μm, consisting of about 2 to 10 mole % of diboride of vanadium or yttrium, optionally very small amounts of oxygen and carbon, and the balance diboride of Group 4b metal, and being sinterable into a body having density approaching theoretical density of the composition and 0-5 volume % open porosity.
Claim 3
Dependent Claim
19 words
The powder of claim 1 wherein diboride of vanadium is in solid solution with the Group 4b metal diboride.
Claim 4
Dependent Claim
12 words
The powder of claim 2 wherein the Group 4b metal is titanium.
Claim 5
Dependent Claim
19 words
The powder of claim 1 wherein diboride of yttrium is in solid solution with the Group 4b metal diboride.
Claim 6
Dependent Claim
12 words
The powder of claim 4 wherein the Group 4b metal is titanium.
Claim 7
Dependent Claim
28 words
A solid body of sintered powder of claim 1 and having been sintered to a density approaching theoretical density of the composition and 0-5 volume % open porosity.
Claim 8
Dependent Claim
17 words
The powder of claim 1 wherein each of oxygen and carbon is less than 1 wt. %.
Claim 9
Dependent Claim
28 words
A solid body of sintered powder of claim 2 and having been sintered to a density approaching theoretical density of the composition and 0-5 volume % open porosity.
Claim 10
Dependent Claim
28 words
A solid body of sintered powder of claim 3 and having been sintered to a density approaching theoretical density of the composition and 0-5 volume % open porosity.
Claim 11
Dependent Claim
28 words
A solid body of sintered powder of claim 4 and having been sintered to a density approaching theoretical density of the composition and 0-5 volume % open porosity.
Claim 12
Dependent Claim
28 words
A solid body of sintered powder of claim 5 and having been sintered to a density approaching theoretical density of the composition and 0-5 volume % open porosity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |