US4836849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation resistant niobium alloy
Assignee: PITTSBURGH/MATERIALS TECHNOLOGY Inc
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Filing: 1987-04-30
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Granted: 1989-06-06
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Expires: 2007-04-30
Abstract
Abstract Disclosed is a mixture of about 55% to about 90% by volume powdered niobium alloy and about 10% to about 45% by volume powdered intermetallic compound selected from the group consisting of NbAl 3 , NbFe 2 , NbCo 2 , NbCr 2 , and mixtures thereof. The mixture is mechanically alloyed to intermix the intermetallic compound with the particles of the niobium alloy. A shape is made by consolidating the mechanically alloyed powder.
Inventors
- 👤 Robert C. Svedberg
- 👤 Robert L. Ammon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:03
CPC Classifications
C; C22; C22C; C22C27/00; C22C27/02; B; B22; B22F; B22F3/00; B22F3/12; B22F3/14; B22F3/15; B22F2003/153; B22F9/00; B22F9/02; B22F9/04; B22F2009/041
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
A mechanically alloyed powder consisting essentially of about 55% to about 90% by volume of niobium alloy, and about 10% to about 45% by volume of intermetallic compound selected from the group consisting of NbAl 3 , NbFe 2 , NbCO 2 , NbCr 2 , and mixtures thereof, where niobium alloy particles have intermetallic compound embedded on their surface.
Claim 2
Dependent Claim
60 words
A mechanically alloyed powder consisting essentially of about 55% to about 90% by volume of niobium alloy, and about 10% to about 45% by volume of intermetallic compound selected from the group consisting of NbAl 3 , NbFe 2 , NbCO 2 , NbCr 2 , and mixtures thereof, where niobium alloy particles have intermetallic compound embedded on their surface.
Claim 3
Dependent Claim
13 words
A shape made by consolidating a mechanically alloyed powder according to claim 1.
Claim 4
Dependent Claim
12 words
A shape according to claim 2 coated with an oxidation resistant coating.
Claim 5
Dependent Claim
30 words
A mechanically alloyed powder according to claim 1 wherein said intermetallic compound is selected from the group consisting of NbAl 3 , NbCo 2 NbCr 2 , and mixtures thereof.
References Cited (Backward Citations)
US3127286A
Cited
US3152891A
Cited
US3038798A
Cited
US3281736A
Cited
US3172196A
Cited
US3231344A
Cited
US3341307A
Cited
US3469976A
Cited
US3577635A
Cited
US3723092A
Cited
US3551946A
Cited
US3682626A
Cited
US3639180A
Cited
US3607251A
Cited
US3723104A
Cited
US3752665A
Cited
US3926568A
Cited
US4059441A
Cited
US4110131A
Cited
US4070184A
Cited
US4084965A
Cited
US4417922A
Cited
US4414029A
Cited
US4443249A
Cited
US4592781A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |