US4778733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low toxicity corrosion resistant solder
Assignee: BASF Catalysts LLC
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Filing: 1986-07-03
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Granted: 1988-10-18
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Expires: 2006-07-03
Abstract
Abstract An article of manufacture, such as is used in plumbing, is formed by soldering copper workpieces together with a lead-free solder having a tin content of from about 92 to 99%, a copper content of from about 0.7 to 6% and a silver content of from about 0.05-3%, by weight.
Inventors
- 👤 Alfonso T. Lubrano
- 👤 Thomas S. Bannos
- 👤 Malcolm Warren
- 👤 Robert A. Dorvel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:29
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; B23K35/262; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12708; Y10T428/12715; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
97 words
A new and useful article of manufacture, comprising: a first copper or copper alloy member, a second copper or copper alloy member positioned closely adjacent said first copper or copper alloy member, and adherent bonding means joining said first and second copper or copper alloy members, said adherent bonding means including a low toxicity, corrosion resistant solder alloy consisting essentially of from about 0.7 to about 6% by weight of copper, from about 0.05 to about 3% by weight of silver and the balance being tin, said solder alloy further being essentially free of lead and arsenic.
Claim 2
Dependent Claim
97 words
A new and useful article of manufacture, comprising: a first copper or copper alloy member, a second copper or copper alloy member positioned closely adjacent said first copper or copper alloy member, and adherent bonding means joining said first and second copper or copper alloy members, said adherent bonding means including a low toxicity, corrosion resistant solder alloy consisting essentially of from about 0.7 to about 6% by weight of copper, from about 0.05 to about 3% by weight of silver and the balance being tin, said solder alloy further being essentially free of lead and arsenic.
Claim 3
Dependent Claim
30 words
The article as claimed in claim 1 wherein said first and second copper or copper alloy members are positioned so that said adherent bonding means forms a lap joint therebetween.
Claim 4
Dependent Claim
24 words
The article as claimed in claim 1, wherein said solder alloy further is essentially free of antimony, cobalt, bismuth, thallium, cadmium, mercury and gallium.
Claim 5
Dependent Claim
49 words
The article as claimed in claim 1, wherein the silver content of said solder alloy is from about 0.25 to about 1.25% by weight, the copper content is from about 2 to about 4% by weight and the tin content is from about 97.75 to about 94.75% by weight.
Claim 6
Dependent Claim
22 words
The article as claimed in claim 1, wherein the maximum silver content of said solder alloy is less than 0.5% by weight.
Claim 7
Dependent Claim
23 words
The article as claimed in claim 2, wherein said first and second copper or copper alloy members comprise copper or copper alloy piping.
Claim 8
Dependent Claim
24 words
The article as claimed in claim 5, wherein the copper content of said solder alloy is from about 4 to about 5% by weight.
Claim 9
Dependent Claim
113 words
A new and useful article of manufacture, comprising: a first copper or copper alloy piping member, a second copper or copper alloy piping member positioned closely adjacent and in overlapping relationship to said first copper or copper alloy piping member, and adherent bonding means forming a lap joint between said first and second copper or copper alloy piping members, said adherent bonding means including a low toxicity, corrosion resistant solder alloy consisting of from about 0.7 to about 6% by weight of copper, from about 0.05 to about 3% by weight of silver and the balance being tin which is essentially free of lead, arsenic, antimony, cobalt, bismuth, thallium, cadmium, mercury and gallium.
Claim 10
Dependent Claim
113 words
A new and useful article of manufacture, comprising: a first copper or copper alloy piping member, a second copper or copper alloy piping member positioned closely adjacent and in overlapping relationship to said first copper or copper alloy piping member, and adherent bonding means forming a lap joint between said first and second copper or copper alloy piping members, said adherent bonding means including a low toxicity, corrosion resistant solder alloy consisting of from about 0.7 to about 6% by weight of copper, from about 0.05 to about 3% by weight of silver and the balance being tin which is essentially free of lead, arsenic, antimony, cobalt, bismuth, thallium, cadmium, mercury and gallium.
Claim 11
Dependent Claim
37 words
The article as claimed in claim 8, wherein the silver content of said solder alloy is from about 0.25 to about 1.25% by weight and the copper content is from about 2 to about 4% by weight.
Claim 12
Dependent Claim
22 words
The article as claimed in claim 8, wherein the maximum silver content of said solder alloy is less than 0.5% by weight.
Claim 13
Dependent Claim
24 words
The article as claimed in claim 10, wherein the copper content of said solder alloy is from about 4 to about 5% by weight.
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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |