US4626282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact material for vacuum circuit breaker
Assignee: Mitsubishi Electric Corp
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Filing: 1985-10-30
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Granted: 1986-12-02
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Expires: 2005-10-30
Abstract
Abstract Contact material for vacuum circuit breaker according to the present invention contains (1) copper, (2) molybdenum, and (3) niobium or tantalum.
Inventors
- 👤 Eizo Naya
- 👤 Mitsuhiro Okumura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:41
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/0203
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
Contact material for vacuum circuit breaker which contains elements of: (1) copper; (2) molybdenum; and (3) niobium or tantalum.
Claim 2
Dependent Claim
19 words
Contact material for vacuum circuit breaker which contains elements of: (1) copper; (2) molybdenum; and (3) niobium or tantalum.
Claim 3
Dependent Claim
45 words
Contact material for vacuum circuit breaker in accordance with claim 1, wherein said contact material contains (1) more than 15 wt. % molybdenum and more than 1 wt. % niobium, or (2) more than 5 wt. % molybdenum and more than 2 wt. % tantalum.
Claim 4
Dependent Claim
37 words
Contact material for vacuum circuit breaker in accordance with claim 1, wherein said contact material contains (1) 15-60 wt. % molybdenum and 1-45 wt. % niobium, or (2) 5-55 wt. % molybdenum and 2-55 wt. % tantalum.
Claim 5
Dependent Claim
48 words
Contact material for vacuum circuit breaker in accordance with claim 1, wherein said elements are dispersed in a state of simple substances thereof, alloys containing at least two of said elements or intermetallic compounds containing at least two of said elements, or as a composite of said states.
Claim 6
Dependent Claim
30 words
Contact material for vacuum circuit breaker in accordance with claim 1, wherein said contact material is prepared by an infiltration method, which is one of methods of applied powder metallurgy.
Claim 7
Dependent Claim
22 words
Contact material for vacuum circuit breaker in accordance with claim 1, wherein said contact material is prepared by a powder sintering method.
Claim 8
Dependent Claim
31 words
Contact material for vacuum circuit breaker in accordance with claim 1, wherein said contact material is prepared by a hot press method, which is one of methods of applied powder metallurgy.
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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |