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US4780275A
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US
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Corrosion-resistant copper alloy and article containing the same
Assignee: William Prym Werke GmbH and Co KG
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Filing: 1987-03-06
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Granted: 1988-10-25
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Expires: 2007-03-06
Abstract
Abstract A corrosion-resistant copper-based alloy contains 0.1-5 percent by weight of nickel; 0.01-1.5 percent by weight total of titanium and niobium; 0.2-5 percent by weight total of iron and chromium; 0.01-0.25 percent by weight total of germanium and gallium; and up to 0.01 percent by weight each of the trace elements phosphorus, silicon and manganese. The alloying elements passivate and cathodically protect the copper while the trace elements function as stabilizers. The alloy may be used for the facades of buildings, for roofs, for the gutters of buildings and for applications involving flowing corrosive media.
Inventors
- 👤 Horst Grefkes
- 👤 Alex Troost
- 👤 Okan Akin
- 👤 Michael Prym
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:38
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
61 words
A corrosion-resistant alloy, consisting essentially of nickle in an amount of at least 0.1 percent by weight, titanium and/or niobium in an amount of at least 0.01 percent by weight, iron and/or chromium in an amount of at least 0.2 percent by weight, germanium and/or gallium in an amount of about 0.01 to 0.25 percent by weight, and the balance copper.
Claim 2
Dependent Claim
61 words
A corrosion-resistant alloy, consisting essentially of nickle in an amount of at least 0.1 percent by weight, titanium and/or niobium in an amount of at least 0.01 percent by weight, iron and/or chromium in an amount of at least 0.2 percent by weight, germanium and/or gallium in an amount of about 0.01 to 0.25 percent by weight, and the balance copper.
Claim 3
Dependent Claim
21 words
The alloy of claim 1, further comprising at least one trace element selected from the group consisting of metalloids and metals.
Claim 4
Dependent Claim
26 words
The alloy of claim 2, wherein the amount of each element of said group consisting of metalloids and metals is at most 0.01 percent by weight.
Claim 5
Dependent Claim
14 words
The alloy of claim 2, wherein said at least one trace element is phosphorus.
Claim 6
Dependent Claim
14 words
The alloy of claim 2, wherein said at least one trace element is silicon.
Claim 7
Dependent Claim
14 words
The alloy of claim 2, wherein said at least one trace element is manganese.
Claim 8
Dependent Claim
44 words
The alloy of claim 1, wherein the amount of nickel is at most 5 percent by weight, the amount of titanium and/or niobium is at most 1.5 percent by weight, and the amount of iron and/or chromium is at most 5 percent by weight.
Claim 9
Dependent Claim
25 words
The alloy of claim 7, comprising at most 0.01 percent by weight each of trace elements selected from the group consisting of metalloids and metals.
Claim 10
Dependent Claim
18 words
The alloy of claim 1, wherein said the amount of nickel is at most 0.2 percent by weight.
Claim 11
Dependent Claim
20 words
The alloy of claim 1, wherein the amount of titanium and/or niobium is at most 2 0.25 percent by weight.
Claim 12
Dependent Claim
18 words
The alloy of claim 1, wherein the amount of iron and/or chromium is at most percent by weight.
Claim 13
Dependent Claim
10 words
A facade constructed of an alloy according to claim 1.
Claim 14
Dependent Claim
10 words
A roof constructed of an alloy according to claim 1.
Claim 15
Dependent Claim
10 words
A gutter constructed of an alloy according to claim 1.
Claim 16
Dependent Claim
19 words
A structure having a section exposed to a corrosive medium and constructed of an alloy according to claim 1.
References Cited (Backward Citations)
US3103741A
Cited
DE3530274A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |