US4670217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder composition
Assignee: J W Harris Co
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Filing: 1985-07-26
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Granted: 1987-06-02
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Expires: 2005-07-26
Abstract
Abstract A low temperature, lead-free, cadmium-free solder for joining metals, primarily copper tube or brass pipe and fittings. The solder composition, being free of lead and other known toxic metals, has a composition range of 0.5-4.0% antimony, 0.5-4.0% zinc, 0.5-2.0% silver and 90.0-98.5% tin, is especially adaptable for plumbing applications where solder joints are exposed to potable water.
Inventors
- 👤 Robert M. Henson
- 👤 Kent H. Cartheuser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:27
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; B23K35/262
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
18 words
A low temperature, lead-free metal solder composition comprising by weight: 0.5-4.0% antimony 0.5-4.0% zinc 0.5-2.0% silver 90.0-98.5% tin.
Claim 2
Dependent Claim
18 words
A low temperature, lead-free metal solder composition comprising by weight: 0.5-4.0% antimony 0.5-4.0% zinc 0.5-2.0% silver 90.0-98.5% tin.
Claim 3
Dependent Claim
18 words
The composition of claim 1, said metals comprising by weight: 0.5% antimony 2.0% zinc 1.0% silver 96.5% tin.
Claim 4
Dependent Claim
18 words
The composition of claim 1, said metals comprising by weight: 3.0% antimony 1.5% zinc 1.0% silver 94.5% tin.
Claim 5
Dependent Claim
19 words
The composition of claim 3, further having a solidus temperature of 390° F. and a liquidus of 440° F.
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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |