US4588657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder composition
Assignee: RCA Corp
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Filing: 1984-11-01
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Granted: 1986-05-13
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Expires: 2004-11-01
Abstract
Abstract A solder is disclosed which consists essentially of from about 55 to about 65 percent by weight of tin, from about 2 to about 3.9 percent by weight of calcium with the remainder being lead. The calcium modified tin-lead solders of this invention are characterized by excellent soldering properties, especially uniform solidification on cooling, and by forming solder joints with a tensile strength of at least about 7000 PSI (49.21x105 kg/sq m).
Inventors
- 👤 Erich F. Kujas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:56
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/26; B23K35/262; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12674; Y10T428/12708; Y10T428/12715
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
36 words
A solder composition consisting essentially of from about 55 to about 65 percent by weight of tin, from about 2 to about 3.9 percent by weight of calcium with the remainder of the composition being lead.
Claim 2
Dependent Claim
36 words
A solder composition consisting essentially of from about 55 to about 65 percent by weight of tin, from about 2 to about 3.9 percent by weight of calcium with the remainder of the composition being lead.
Claim 3
Dependent Claim
27 words
The solder composition according to claim 1 wherein tin is present in the composition in an amount of from about 61.5 to about 62.5 percent by weight.
Claim 4
Dependent Claim
27 words
The solder composition according to claim 1 wherein calcium is present in the composition in an amount of from about 2.4 to about 3.2 percent by weight.
Claim 5
Dependent Claim
23 words
The solder composition according to claim 1 wherein the calcium is present the composition in an amount of about 2.8 percent by weight.
Claim 6
Dependent Claim
47 words
The solder composition according to claim 1 wherein the tin is present in the composition in an amount from about 61.5 to 62.5 percent by weight and wherein the calcium is present in the composition in an amount of about 2.4 to about 3.2 percent by weight.
Claim 7
Dependent Claim
44 words
The solder composition according to claim 1 wherein the tin is present in the composition in an amount of about 61.5 to about 62.5 percent by weight and the calcium is present in the composition in an amount of about 2.8 percent by weight.
Claim 8
Dependent Claim
59 words
A solder joint comprised of materials bonded to each other with a solder consisting essentially of from about 55 to about 65 percent by weight of tin from about 2 to about 3.9 percent by weight of calcium and the remainder being lead and having a tensile strength as formed of at least 7000 PSI (49.21×10 5 kg/sq m).
Claim 9
Dependent Claim
59 words
A solder joint comprised of materials bonded to each other with a solder consisting essentially of from about 55 to about 65 percent by weight of tin from about 2 to about 3.9 percent by weight of calcium and the remainder being lead and having a tensile strength as formed of at least 7000 PSI (49.21×10 5 kg/sq m).
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) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |