US4402742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iron-nickel base brazing filler metal
Assignee: GET Products Corp
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Filing: 1981-10-29
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Granted: 1983-09-06
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Expires: 2001-10-29
Abstract
Abstract Iron based brazing alloys selected from particular alloys of the B-Si-Ni-Fe and B-Si-Ni-Cr-Fe systems are practical substitutes for AMS4777 alloy (3B 4Si 7Cr 3Fe 83Ni).
Inventors
- 👤 Surya Pattanaik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:54
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/3066
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
46 words
A iron nickel base brazing filler metal, consisting essentially of, by weight percent, about 1 to 5 percent boron, 3 to 6 percent silicon, 0 to 12 percent chromium, 1 to 45 percent nickel and balance essentially iron, having a liquidus temperature below about 1130° C.
Claim 2
Dependent Claim
46 words
A iron nickel base brazing filler metal, consisting essentially of, by weight percent, about 1 to 5 percent boron, 3 to 6 percent silicon, 0 to 12 percent chromium, 1 to 45 percent nickel and balance essentially iron, having a liquidus temperature below about 1130° C.
Claim 3
Dependent Claim
44 words
An alloy according to claim 1 wherein the boron content is from about 3 to about 4.5% by weight, the silicon content is from about 4 to about 5% by weight and the nickel content is from about 20 to about 40% by weight.
Claim 4
Dependent Claim
22 words
An alloy according to claim 2 wherein the chromium is present in amounts of from about 3% to about 12% by weight.
References Cited (Backward Citations)
US2880086A
Cited
US3836358A
Cited
US4066447A
Cited
JPS5334634A
Cited
US4169744A
Cited
US4160854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |