US3703254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre-fluxed solder powder
Assignee: NCR Voyix Corp
•
Filing: 1970-05-07
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Granted: 1972-11-21
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Expires: 1990-05-07
Abstract
Abstract A solder powder is disclosed comprising minute particles of metallic alloy solder coated by a thin layer of rosin soldering flux such that the flux performs a triple function of: (a) insulating the individual alloy solder particles from electrical conductance; (b) adhesively holding individual particles of solder in place by virtue of the sticky characteristics of the preferred fluxes used to coat the solder powder; and (c) providing, when melted, an agent to clean substrates and workpieces to be joined by soldering.
Inventors
- 👤 Theodore Maierson
- 👤 Harry L Roe Jr
- 👤 James E Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:09
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0222; B23K35/0244; B23K35/22; B23K35/24; B23K35/26; B23K35/262; H; H05; H05K; H05K3/00; H05K3/30; H05K3/32; H05K3/34; H05K3/3465; H05K3/3485; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
57 words
An electrically non-conducting, powder, soldering composition consisting essentially of, in a free-flowing mass, a multitude of individual minute particles of solder alloy about 5 to 500 microns in average diameter, each covered by a thin, continuous, coating consisting essentially of a dielectric, organic, flux material having a melting temperature below the melting temperature of the solder alloy.
Claim 2
Dependent Claim
57 words
An electrically non-conducting, powder, soldering composition consisting essentially of, in a free-flowing mass, a multitude of individual minute particles of solder alloy about 5 to 500 microns in average diameter, each covered by a thin, continuous, coating consisting essentially of a dielectric, organic, flux material having a melting temperature below the melting temperature of the solder alloy.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein the flux material consists essentially of a rosin and is an electrical insulator, an adhesive to hold individual particles in place on a workpiece and, when melted, a cleaning agent for metallic substrates.
Claim 4
Dependent Claim
23 words
The composition of claim 1 wherein the flux material is present in an amount from about 5 to about 50 percent, by weight.
Claim 5
Dependent Claim
49 words
An article of fluxing solder alloy consisting essentially of a minute particle of metallic solder alloy about 5 to 500 microns in diameter and a continuous coating consisting essentially of organic flux material covering the particle and having a melting temperature below the melting point of the solder alloy.
Claim 6
Dependent Claim
49 words
An article of fluxing solder alloy consisting essentially of a minute particle of metallic solder alloy about 5 to 500 microns in diameter and a continuous coating consisting essentially of organic flux material covering the particle and having a melting temperature below the melting point of the solder alloy.
Claim 7
Dependent Claim
39 words
The article of claim 4 wherein the flux material consists essentially of a rosin and is an electrical insulator, an adhesive to hold individual particles in place on a workpiece and, when melted, a cleaning agent for metallic substrates.
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |