US4879096A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead- and antimony-free solder composition
Assignee: Oatey Co
•
Filing: 1989-04-19
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Granted: 1989-11-07
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Expires: 2009-04-19
Abstract
Abstract Lead-free and antimony-free solder compositions are described which comprise, as essential ingredients, about 0.05% to about 3% by weight of silver; about 0.5% to about 6% by weight of copper; about 0.1% to about 3% by weight of bismuth; and about 88% to about 99.35% by weight of tin. In preferred embodiments, the solders are also essentially free of cadmium and may also be essentially free of both cadmium and zinc.
Inventors
- 👤 Paul E. Naton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
C; C22; C22C; C22C13/00; B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; B23K35/262
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
47 words
A lead- and antimony-free solder composition comprising as essential ingredients about 0.05% to about 3% by weight of silver; about 0.5% to about 6% by weight of copper, about 0.1% to about 3% by weight of bismuth; and about 88% to about 99.35% by weight of tin.
Claim 2
Dependent Claim
47 words
A lead- and antimony-free solder composition comprising as essential ingredients about 0.05% to about 3% by weight of silver; about 0.5% to about 6% by weight of copper, about 0.1% to about 3% by weight of bismuth; and about 88% to about 99.35% by weight of tin.
Claim 3
Dependent Claim
12 words
The solder composition of claim 1 which is essentially free of cadmium.
Claim 4
Dependent Claim
14 words
The solder composition of claim 1 which is essentially free of cadmium and zinc.
Claim 5
Dependent Claim
16 words
The solder composition of claim 1 containing about 1% to about 5% by weight of copper.
Claim 6
Dependent Claim
16 words
The solder composition of claim 1 containing about 0.5% to about 2% by weight of bismuth.
Claim 7
Dependent Claim
14 words
The solder composition of claim 1 containing less than 1% by weight of silver.
Claim 8
Dependent Claim
14 words
The solder composition of claim 1 containing less than 0.5% by weight of silver.
Claim 9
Dependent Claim
47 words
A lead- and antimony-free solder composition comprising as essential ingredients about 0.05% to about 0.5% by weight of silver; about 1% to about 5% by weight of copper; about 0.5% to about 2% by weight of bismuth; and about 92.5% to about 98.45% by weight of tin.
Claim 10
Dependent Claim
47 words
A lead- and antimony-free solder composition comprising as essential ingredients about 0.05% to about 0.5% by weight of silver; about 1% to about 5% by weight of copper; about 0.5% to about 2% by weight of bismuth; and about 92.5% to about 98.45% by weight of tin.
Claim 11
Dependent Claim
12 words
The solder composition of claim 9 which is essentially free of cadmium.
Claim 12
Dependent Claim
14 words
The solder composition of claim 9 which is essentially free of cadmium and zinc.
Claim 13
Dependent Claim
34 words
A lead- and antimony-free solder composition comprising as essential ingredients about 0.1% by weight of silver; about 3% by weight of copper; about 1% by weight of bismuth; and the balance is substantially tin.
Claim 14
Dependent Claim
34 words
A lead- and antimony-free solder composition comprising as essential ingredients about 0.1% by weight of silver; about 3% by weight of copper; about 1% by weight of bismuth; and the balance is substantially tin.
Claim 15
Dependent Claim
14 words
The solder composition of claim 11 which is also free of cadmium and zinc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-06 | 1993-05-08 | 1993-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-06 | 1997-05-08 | 1997-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-06 | 2001-05-08 | 2001-11-07 | $7700.00 | Window Closed / Lapsed |