Patent US4169729A successfully refreshed from Google Patents.
US4169729A
Expired / Lapsed
US
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Corrosion resistant copper base alloys for heat exchanger tube
Assignee: Olin Corp
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Filing: 1978-02-21
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Granted: 1979-10-02
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Expires: 1998-02-21
Abstract
Abstract An alloy system is disclosed which is particularly useful for heat exchanger and potable water tubing applications. This alloy system utilizes additions of nickel, tin and manganese in a copper base with the optional addition of aluminum. Such elements as arsenic, antimony and phosphorus may be added as parting inhibitors to this system.
Inventors
- 👤 James M. Popplewell
- 👤 Constance F. Acton
- 👤 Andrew J. Brock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:01
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/085; C; C22; C22C; C22C9/00; C22C9/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
54 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, said alloy being free of aluminum, said alloy having an improved steady state corrosion rate, said alloy consisting essentially of 3.0 to 7.5% by weight nickel, 0.5 to 4.0% by weight tin and 0.001 to 1.0% by weight manganese, balance copper.
Claim 2
Dependent Claim
54 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, said alloy being free of aluminum, said alloy having an improved steady state corrosion rate, said alloy consisting essentially of 3.0 to 7.5% by weight nickel, 0.5 to 4.0% by weight tin and 0.001 to 1.0% by weight manganese, balance copper.
Claim 3
Dependent Claim
31 words
An alloy according to claim 1 further consisting essentially of 0.01 to 2.0% by weight of an element selected from the group consisting of arsenic, antimony and phosphorus or combinations thereof.
Claim 4
Dependent Claim
36 words
An alloy according to claim 1 wherein the elements present in said alloy consist essentially of 4.0 to 6.0% by weight nickel, 1.0 to 3.0% by weight tin, 0.1 to 0.5% by weight manganese, balance copper.
Claim 5
Dependent Claim
71 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, wherein the elements present in said alloy consist essentially of 3.0 to 7.5% by weight nickel, 0.5 to 4% by weight tin, up to 4% by weight aluminum, 0.001 to 1.0% by weight manganese, and 0.01 to 2.0% by weight of an element selected from the group consisting of arsenic and antimony or combinations thereof, the balance copper.
Claim 6
Dependent Claim
71 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, wherein the elements present in said alloy consist essentially of 3.0 to 7.5% by weight nickel, 0.5 to 4% by weight tin, up to 4% by weight aluminum, 0.001 to 1.0% by weight manganese, and 0.01 to 2.0% by weight of an element selected from the group consisting of arsenic and antimony or combinations thereof, the balance copper.
Claim 7
Dependent Claim
42 words
An alloy according to claim 4 wherein the elements present in said alloy consist essentially of 4.0 to 6.0% by weight nickel, 2.0 to 3.0% by weight aluminum, 1.0 to 3.0% by weight tin, 0.1 to 0.5% by weight manganese, balance copper.
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) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |