Patent US4171972A successfully refreshed from Google Patents.
US4171972A
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: 1979-10-23
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Expires: 1998-02-21
Abstract
Abstract An alloy system is disclosed which is particularly useful for heat exchanger and water tubing applications. This alloy system utilizes additions of zinc, nickel and iron to a copper base. Cobalt and manganese may also be added to the alloy and such elements as arsenic, antimony and phosphorus may be added as parting inhibitors to the system.
Inventors
- 👤 John F. Bates
- 👤 James M. Popplewell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:47
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/085; C; C22; C22C; C22C9/00; C22C9/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
43 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, wherein the elements present in said alloy consist essentially of 8 to 20% by weight zinc, 3 to 7% by weight nickel, 1.32 to 2% by weight iron, balance copper.
Claim 2
Dependent Claim
43 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, wherein the elements present in said alloy consist essentially of 8 to 20% by weight zinc, 3 to 7% by weight nickel, 1.32 to 2% by weight iron, balance copper.
Claim 3
Dependent Claim
19 words
An alloy according to claim 1 wherein 0.2 to 1% by weight cobalt is also present in said alloy.
Claim 4
Dependent Claim
19 words
An alloy according to claim 1 wherein 0.001 to 1% by weight manganese is also present in said alloy.
Claim 5
Dependent Claim
36 words
An alloy according to claim 1 wherein 0.01 to 2% by weight for each of the elements selected from the group consisting of arsenic, antimony and phosphorus, or combinations thereof, is also present in said alloy.
Claim 6
Dependent Claim
42 words
An alloy according to claim 1 which is free of aluminum and wherein the elements present in said alloy consists essentially of 14 to 20% by weight zinc, 4 to 6% by weight nickel, 1.32 to 2% by weight iron, balance copper.
Claim 7
Dependent Claim
19 words
An alloy according to claim 5 wherein 0.3 to 0.7% by weight cobalt is also present in said alloy.
Claim 8
Dependent Claim
19 words
An alloy according to claim 5 wherein 0.003 to 0.4% by weight manganese is also present in said alloy.
Claim 9
Dependent Claim
36 words
An alloy according to claim 5 wherein 0.01 to 2% by weight for each of the elements selected from the group consisting of arsenic, antimony and phosphorus, or combinations thereof, is also present in said alloy.
Claim 10
Dependent Claim
49 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, wherein the elements present in said alloy consist essentially of 8 to 20% by weight zinc, 3 to 7% by weight nickel, 1 to 2% by weight iron, 0.2 to 1% by weight cobalt, balance copper.
Claim 11
Dependent Claim
49 words
A corrosion resistant single phase alloy which is particularly useful in tubing applications, wherein the elements present in said alloy consist essentially of 8 to 20% by weight zinc, 3 to 7% by weight nickel, 1 to 2% by weight iron, 0.2 to 1% by weight cobalt, 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) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |