US4460414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder paste and vehicle therefor
Assignee: SCM Metal Products Inc
•
Filing: 1983-10-31
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Granted: 1984-07-17
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Expires: 2003-10-31
Abstract
Abstract An essentially nonaqueous, water-rinsible, readily fusible vehicle for paste of powdered solder is comprised of a dispersion of flux consisting essentially of alkali metal hydroxide in liquid polyol and water soluble, normally solid synthetic wax.
Inventors
- 👤 Jennie S. Hwang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:45
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
A vehicle for powdered solder, said vehicle being essentially nonaqueous, removable from metal surfaces by water rinsing, fluent at a temperature below that at which said solder melts, and consisting essentially of a dispersion of flux in water soluble, normally solid synthetic wax, said flux consisting essentially of alkali metal hydroxide in liquid polyol.
Claim 2
Dependent Claim
54 words
A vehicle for powdered solder, said vehicle being essentially nonaqueous, removable from metal surfaces by water rinsing, fluent at a temperature below that at which said solder melts, and consisting essentially of a dispersion of flux in water soluble, normally solid synthetic wax, said flux consisting essentially of alkali metal hydroxide in liquid polyol.
Claim 3
Dependent Claim
19 words
The vehicle of claim 1 wherein said alkali metal hydroxide is sodium hydroxide in a proportion of about 0.05-5%.
Claim 4
Dependent Claim
10 words
The vehicle of claim 1 wherein said polyol is glycerine.
Claim 5
Dependent Claim
31 words
The vehicle of claim 1 wherein said wax is a waxy polyethylene glycol having molecular weight between about 3,000 and about 15,000, and it is in a proportion of about 10-40%.
Claim 6
Dependent Claim
16 words
The paste vehicle of claim 1 wherein said flux contains water soluble amine and/or amine salt.
Claim 7
Dependent Claim
12 words
The paste vehicle of claim 6 wherein said amine comprises an alkanolamine.
Claim 8
Dependent Claim
11 words
The paste vehicle of claim 1 wherein said flux contains surfactant.
Claim 9
Dependent Claim
11 words
The paste vehicle of claim 1 wherein said flux contains diluent.
Claim 10
Dependent Claim
35 words
A solder paste consisting essentially of: 75-95 parts of tin-containing solder melting below 330° and having particle size not substantially coarser than about 100 mesh; and 5-25 parts of the paste vehicle of claim 1.
Claim 11
Dependent Claim
21 words
The solder paste of claim 9 wherein said flux contains sodium hydroxide, an alkanolamine and/or a salt thereof, surfactant, and diluent.
References Cited (Backward Citations)
US1978318A
Cited
US2493372A
Cited
US3073270A
Cited
US3925112A
Cited
US3954494A
Cited
US4273593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |