US4543135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel high-chromium base brazing filler metal for high temperature applications
Assignee: Honeywell International Inc
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Filing: 1982-11-15
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Granted: 1985-09-24
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Expires: 2002-11-15
Abstract
Abstract A nickel based high melting point, homogeneous, ductile brazing foil composition consists essentially of about 17 to 20 atom percent chromium, about 4 to 10 atom percent boron, about 10 to 16 atom percent silicon, the balance being nickel and incidental impurities. The composition is such that the total of nickel and chromium ranges from about 74 to 84 atom percent.
Inventors
- 👤 Debasis Bose
- 👤 Alfred Freilich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:48
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3033; B23K35/304; B23K35/02; B23K35/0222; B23K35/0233; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
37 words
A homogeneous ductile brazing foil having a composition consisting essentially of 17.5 to 18.5 atom percent chromium, 12.5 to 13.5 atom percent silicon and 5 to 6 atom percent boron, the balance being nickel and incidental impurities.
Claim 2
Dependent Claim
37 words
A homogeneous ductile brazing foil having a composition consisting essentially of 17.5 to 18.5 atom percent chromium, 12.5 to 13.5 atom percent silicon and 5 to 6 atom percent boron, the balance being nickel and incidental impurities.
Claim 3
Dependent Claim
17 words
A brazing foil composition as recited in claim 1, which has at least 50 percent glassy structure.
Claim 4
Dependent Claim
20 words
A brazing foil as recited in claim 2, said foil having a thickness ranging from about 0.0010 to 0.0025 inch.
Claim 5
Dependent Claim
18 words
A brazing foil as recited in claim 2, said foil having at least about 80 percent glassy structure.
Claim 6
Dependent Claim
14 words
A brazing foil as recited in claim 4, said foil having substantially glassy structure.
References Cited (Backward Citations)
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US4148973A
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US4283225A
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |