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US 4,778,733 AGranted
Low toxicity corrosion resistant solder
AssigneeEngelhard Corporation
InventorsAlfonso T. Lubrano, Thomas S. Bannos, Malcolm Warren, Robert A. Dorvel
Life of this patent
Estimating the term…
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.
Claims11
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.
1 more element
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.
Dependencies are inferred from the claim text.