US2887772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder composition and method of soldering using same
Assignee: Sprague Electric Co
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Filing: 1953-10-14
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Granted: 1959-05-26
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Expires: 1973-10-14
Abstract
No abstract record available.
Inventors
- 👤 David B Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:37
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
79 words
A COMPOSITION FOR USE IN JOINING SMALL METALLIC CONTACT AREAS THAT ARE IMMEDIATELY ADJACENT AREAS SUBJECT TO THERMAL DEGRADATION, SAID COMPOSITION CONSISTING ESSENTIALLY OF 60 TO 80 PARTS OF SOLDER, 25 TO 10 PARTS OF A NONCORROSIVE FLUX, AND 20 TO 5 PARTS OF A MATERIAL EXHIBITING IN EXCESS OF 75 PERCENT ABSORPTION OF INFRARED RADIATION, SAID MATERIAL BEING NON-COMPATIBLE WITH SAID SOLDER AND COMPATIBLE WITH SAID FLUX, SAID MATERIAL FURTHER BEING OF A LOWER DENSITY THAN SAID SOLDER.
Claim 2
Dependent Claim
79 words
A COMPOSITION FOR USE IN JOINING SMALL METALLIC CONTACT AREAS THAT ARE IMMEDIATELY ADJACENT AREAS SUBJECT TO THERMAL DEGRADATION, SAID COMPOSITION CONSISTING ESSENTIALLY OF 60 TO 80 PARTS OF SOLDER, 25 TO 10 PARTS OF A NONCORROSIVE FLUX, AND 20 TO 5 PARTS OF A MATERIAL EXHIBITING IN EXCESS OF 75 PERCENT ABSORPTION OF INFRARED RADIATION, SAID MATERIAL BEING NON-COMPATIBLE WITH SAID SOLDER AND COMPATIBLE WITH SAID FLUX, SAID MATERIAL FURTHER BEING OF A LOWER DENSITY THAN SAID SOLDER.
Claim 3
Dependent Claim
92 words
A METHOD OF SOLDERING ELECTRONIC COMPONENTS HAVING METALLIC CONTACT AREAS IMMEDIATELY ADJACENT AREAS SUBJECT TO THERMAL DEGRADATION, SAID METHOD COMPRISING THE STEPS OF POSITIONING THE COMPOSITION OF CLAIM 1 IN CONTACT WITH THE SURFACES TO BE JOINED, THEN DIRECTING INFRARED RADIATION ON SAID COMPOSITION WHEREBY SAID COMPOSITION MELTS BY VIRTUE OF THE ABSORPTIVE MATERIAL BEFORE DAMAGE TO SAID ADJACENT AREAS, AND THEN PERMITTING SAID COMPOSITION TO COOL, WHEREBY SAID NONCOMPATIBLE LOWER DENSITY ABSORPTIVE MATERIAL COLLECTS ON THE SURFACE OF SAID COMPOSITION SO AS TO LEAVE A PURE SOLDER JOINT BETWEEN SAID SURFACES.
References Cited (Backward Citations)
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GB264814A
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FR656482A
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Cited
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Cited
GB664882A
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US2700623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |