Low toxicity corrosion resistant solder

Patent 4778733 Issued on October 18, 1988. Estimated Expiration Date:

July 3, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

1239195

1437641

Solder composition
Patent #: 4357162
Issued on: 11/02/1982
Inventor: Guan

Solder composition Patent #: 4670217
Issued on: 06/02/1987
Inventor: Henson , et al.

Inventors

Assignee

Engelhard Corporation

Application

No. 06/882050 filed on 07/03/1986

US Classes:

428/647, Next to Group IB metal-base component420/560, Copper containing428/675Next to Co-, Cu-, or Ni-base component

Examiners

Primary: Zimmerman, John J.

International Class

B23K 35/26 (20060101)

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.

Other References

"Somalloy Solder Alloys", Semi-Alloys Technical Buttetin No. SA-64, 1968, 4 pages
H. Manko, "Solders and Soldering", McGraw-Hill Book Co., N.Y., 1964, pp. 16-25, 179-180, 308-310
A. D. Merriman, "A Dictionary of Metallurgy", Macdonald & Evans, Ltd., London, 1958, p. 20-Block Tin
Dowd, J. D. "Solder Fluxes and Techniques for Soldering Aluminum", Symposium on Solder, 59th Annual Meeting of American Society for Testing Materials, Philadelphia, PA, pp. 5-9 (1956) (Exhibit A)
McKeown, J. The Properties of Soft Solders and Soldered Joints, British Non-Ferrous Metals Research Association, pp. 14-15 (1948)
Hackh's Chemical Dictionary, "Block Tin"
Soldering Manual, 2nd Edition (rev.) (1977), American Welding Society, Inc., Miami, Fla., pp. 3-12
London, J. et al., "Some Properties of Soldered Joints Made with a Tin/Silver Eutectic Alloy", Brazing and Soldering, No. 10, pp. 17-20 (1986)
E. Gebhardt et al, "On the Structure of the Silver/Copper/Tin System", Metallkde, vol. 50 (1959), No. 10, pp. 597-605
M. E. Warwick, "Plumbing Solders", International Tin Research Institute, Greenford, Middlesex, England, Nov. 1984, 13 pages