Patent US6578628B1 successfully refreshed from Google Patents.
US6578628B1
Expired / Lapsed
US
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Article exhibiting increased resistance to galvanic corrosion
Assignee: Carrier Corp
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Filing: 1996-10-21
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Granted: 2003-06-17
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Expires: 2016-10-21
Abstract
Abstract An article comprised of dissimilar metals in contact with one another wherein the exposed surface of the more noble metal is coated with a metal more galvanically compatible with the less noble metal. The article exhibits increased resistance to galvanic corrosion.
Inventors
- 👤 Thomas J. Garosshen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:37
CPC Classifications
C; C23; C23C; C23C30/00; F; F28; F28F; F28F19/00; F28F19/02; F28F19/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A heat exchanger exhibiting resistance to galvanic corrosion, comprising: a fin collar formed from a first metal; and a tube connected with said fin collar at a contact area said tube formed from copper, said copper substantially more noble than said first metal, such that direct contact between said first metal and said copper in the presence of an electrolyte would lead to galvanic corrosion, and having a surface which is substantially treated with a contact material prior to the correction of said tube with said fin collar, said contact material located at least in the location of said contact area and comprising a third metal galvanically compatible with said first metal, wherein said contact material contacts said fin collar and prevents contact between said surface of said tube and said fin collar for substantially preventing galvanic corrosion of said fin collar relative to said tube.
Claim 2
Dependent Claim
146 words
A heat exchanger exhibiting resistance to galvanic corrosion, comprising: a fin collar formed from a first metal; and a tube connected with said fin collar at a contact area said tube formed from copper, said copper substantially more noble than said first metal, such that direct contact between said first metal and said copper in the presence of an electrolyte would lead to galvanic corrosion, and having a surface which is substantially treated with a contact material prior to the correction of said tube with said fin collar, said contact material located at least in the location of said contact area and comprising a third metal galvanically compatible with said first metal, wherein said contact material contacts said fin collar and prevents contact between said surface of said tube and said fin collar for substantially preventing galvanic corrosion of said fin collar relative to said tube.
Claim 3
Dependent Claim
131 words
A heat exchanger exhibiting resistance to galvanic corrosion comprising: a fin collar formed from aluminum; and a tube connected with said fin collar at a contact area, said tube formed from copper, said copper substantially more noble than said aluminum, such that direct contact between said aluminum and said copper in the presence of an electrolyte would lead to galvanic corrosion, and having a surface which is substantially treated with a contact material prior to the connection of said tube with said fin collar, said contact material located at least in the location of said aluminum metal, wherein said contact material contacts said fin collar and prevents contact between said surface of said tube and said fin collar for substantially preventing galvanic corrosion of said fin collar relative to said tube.
Claim 4
Dependent Claim
131 words
A heat exchanger exhibiting resistance to galvanic corrosion comprising: a fin collar formed from aluminum; and a tube connected with said fin collar at a contact area, said tube formed from copper, said copper substantially more noble than said aluminum, such that direct contact between said aluminum and said copper in the presence of an electrolyte would lead to galvanic corrosion, and having a surface which is substantially treated with a contact material prior to the connection of said tube with said fin collar, said contact material located at least in the location of said aluminum metal, wherein said contact material contacts said fin collar and prevents contact between said surface of said tube and said fin collar for substantially preventing galvanic corrosion of said fin collar relative to said tube.
References Cited (Backward Citations)
US3678242A
Cited
US3718961A
Cited
US4170221A
Cited
US4410036A
Cited
US4733331A
Cited
US5042574A
Cited
US5131463A
Cited
US5137067A
Cited
US5292595A
Cited
US5554234A
Cited
GB2284882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-06-16 | 2006-12-16 | 2007-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-16 | 2010-12-16 | 2011-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-06-16 | 2014-12-16 | 2015-06-17 | $7700.00 | Window Closed / Lapsed |