US4448851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homogeneous low melting point copper based alloys
Assignee: Honeywell International Inc
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Filing: 1982-09-20
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Granted: 1984-05-15
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Expires: 2002-09-20
Abstract
Abstract A copper based low melting point metal alloy composition consists essentially of about 2.5 to 11 atom percent tin and about 11 to 15 atom percent boron, the balance being essentially copper and incidental impurities. The composition is such that the total of copper and tin ranges from about 85 to 89 atom percent.
Inventors
- 👤 Debasis Bose
- 👤 Amitava Datta
- 👤 Nicholas J. DeCristofaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:44
CPC Classifications
C; C22; C22C; C22C45/00; C22C45/001; B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/22; B23K35/24; B23K35/30; B23K35/302; C22C9/00; C22C9/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12431
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
47 words
A metal alloy having a composition consisting essentially of about 2.5 to 11 atom percent tin and about 11 to 15 atom percent boron, the balance being copper and incidental impurities and the total of copper and tin ranging from about 85 to 89 atom percent structure.
Claim 2
Dependent Claim
47 words
A metal alloy having a composition consisting essentially of about 2.5 to 11 atom percent tin and about 11 to 15 atom percent boron, the balance being copper and incidental impurities and the total of copper and tin ranging from about 85 to 89 atom percent structure.
Claim 3
Dependent Claim
16 words
A metal alloy composition as recited in claim 1, which has at least about 50% glassy.
Claim 4
Dependent Claim
16 words
A metal alloy composition as recited in claim 1, which has at least partially glassy structure.
Claim 5
Dependent Claim
36 words
A metal alloy as recited in claim 1, having a composition consisting essentially of about 10 to 11 atom percent tin, about 11 to 13 atom percent boron and about 75 to 78 atom percent copper.
Claim 6
Dependent Claim
31 words
A metal alloy composition as recited in claim 1, having a composition consisting essentially of about 77 atom percent copper, about 11 atom percent tin and about 12 atom percent boron.
Claim 7
Dependent Claim
47 words
A homogeneous brazing foil having a composition consisting essentially of about 2.5 to 11 atom percent tin and about 11 to 15 atom percent boron, the balance being copper and incidental impurities and the total of copper and tin ranging from about 85 to 89 atom percent.
Claim 8
Dependent Claim
47 words
A homogeneous brazing foil having a composition consisting essentially of about 2.5 to 11 atom percent tin and about 11 to 15 atom percent boron, the balance being copper and incidental impurities and the total of copper and tin ranging from about 85 to 89 atom percent.
Claim 9
Dependent Claim
20 words
A brazing foil as recited in claim 6, said foil having a thickness ranging from about 0.0010 to 0.0025 inch.
Claim 10
Dependent Claim
19 words
A brazing foil as recited in claim 6, said foil being ductile and having at least partially glassy structure.
Claim 11
Dependent Claim
17 words
A brazing foil as recited in claim 8, said foil having at least about 50% glassy structure.
Claim 12
Dependent Claim
16 words
A brazing foil as recited in claim 8, said foil having at least partially glassy structure.
Claim 13
Dependent Claim
76 words
A process for fabricating homogeneous ductile foil having a composition consisting essentially of 2.5 to 11 atom percent tin and 11 to 15 atom percent boron, the balance being copper and incidental impurities and the total of copper and tin ranging from about 85 to 89 atom percent, which process comprises forming a melt of the composition and quenching the melt on a rotating chill block at a rate of at least about 10 5 °C./sec.
Claim 14
Dependent Claim
76 words
A process for fabricating homogeneous ductile foil having a composition consisting essentially of 2.5 to 11 atom percent tin and 11 to 15 atom percent boron, the balance being copper and incidental impurities and the total of copper and tin ranging from about 85 to 89 atom percent, which process comprises forming a melt of the composition and quenching the melt on a rotating chill block at a rate of at least about 10 5 °C./sec.
Claim 15
Dependent Claim
37 words
The process of claim 11 in which the foil has a composition consisting essentially of about 10 to 11 atom percent tin, about 11 to 13 atom percent boron and about 75 to 78 atom percent copper.
Claim 16
Dependent Claim
18 words
The process of claim 11 in which said foil has a thickness ranging from 0.0010 to 0.0025 inch.
Claim 17
Dependent Claim
9 words
A product produced by the process of claim 11.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |