Patent US4269870A successfully refreshed from Google Patents.
US4269870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solder flux and method
Assignee: HOLLIS AUTOMATION Co A Corp OF
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Filing: 1976-02-02
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Granted: 1981-05-26
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Expires: 1996-02-02
Abstract
Abstract Electrical and electronic components loosely mounted in a circuit board with their leads extending through holes in the board are temporarily stabilized in position in the board by treating the board and component leads at least in part with a selected material in liquid state, and hardening the material to form a solid, solder-compatible, non-metallic cement having a melting point below that of solder, coupling the board and leads to one another. The component leads may then be trimmed to finish length, and the components soldered in place. Alternatively the board may be placed in storage for future soldering. The cement is melted and displaced simultaneously with soldering. Preferred as cement are naturally occurring and synthetic waxes having a melting point in the range of about 120°195° F. In a preferred embodiment of the invention compatible flux active agents and/or wetting agents may be intermixed with the liquid material whereby the board and component leads may be fluxed simultaneously with treating to temporarily stabilize the components in the board.
Inventors
- 👤 Kenneth G. Boynton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:48
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/04; H05K13/046; H05K13/0465; B; B23; B23K; B23K35/00; B23K35/22; B23K35/36; B23K35/3612; B23K35/3613; H05K3/00; H05K3/30; H05K3/303; H05K3/305; H05K3/306; H05K2203/00; H05K2203/07; H05K2203/0756; H05K2203/0769; H05K3/22; H05K3/28; H05K3/282; H05K3/32; H05K3/34; H05K3/3447; H05K3/3489; Y; Y02; Y02P; Y02P70/00; Y02P70/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49124; Y10T29/4913; Y10T29/49139; Y10T29/49144
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
122 words
A method of mass fluxing electrical and electronic components assembled in a perforated circuit board, said board having adjacent at least some of its perforations a metallic pattern to which the component leads can subsequently be joined by solder, and wherein the component leads extend through at least some of the perforations in said board, said method comprising applying to said leads and metallic pattern a flux active agent intermixed in a meltable material, said meltable material having the characteristics of being compatible with said solder and flux active agent, of having a melting point below that of said solder, and of being capable of forming a solid matrix in which said leads and metallic pattern are retained in a fixed relationship.
Claim 2
Independent Claim
122 words
A method of mass fluxing electrical and electronic components assembled in a perforated circuit board, said board having adjacent at least some of its perforations a metallic pattern to which the component leads can subsequently be joined by solder, and wherein the component leads extend through at least some of the perforations in said board, said method comprising applying to said leads and metallic pattern a flux active agent intermixed in a meltable material, said meltable material having the characteristics of being compatible with said solder and flux active agent, of having a melting point below that of said solder, and of being capable of forming a solid matrix in which said leads and metallic pattern are retained in a fixed relationship.
Claim 3
Dependent Claim
22 words
A method according to claim 1 wherein said material has a melting point temperature in the range of from about 120°-195° F.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein said material is selected from the group consisting of waxes, resins and polymers.
Claim 5
Dependent Claim
14 words
A method according to claim 3 wherein said wax comprises a naturally occurring wax.
Claim 6
Dependent Claim
15 words
A method according to claim 4 wherein said naturally occurring wax comprises a vegetable wax.
Claim 7
Dependent Claim
15 words
A method according to claim 4 wherein said naturally occurring wax comprises an animal wax.
Claim 8
Dependent Claim
17 words
A method according to claim 4 wherein said naturally occurring wax comprises a petroleum derived mineral wax.
Claim 9
Dependent Claim
18 words
A method according to claim 3 wherein said material comprises a synthetic wax derived from a Fischer-Tropsch synthesis.
Claim 10
Dependent Claim
23 words
A method according to claim 3 wherein said material comprises a resin selected from the group consisting of alkyl resins and dipentene resins.
Claim 11
Dependent Claim
24 words
A method according to claim 3 wherein said material comprises a polymer selected from the group consisting of polyethylene, polybutene, polyindene and polyvinyl acetate.
Claim 12
Dependent Claim
13 words
A method according to claim 3 wherein said material comprises a water-soluble polymer.
Claim 13
Dependent Claim
21 words
A method according to claim 1 and including the step of intermixing a wetting agent with said flux and said material.
Claim 14
Dependent Claim
14 words
A method according to claim 12 wherein said wetting agent comprises a non-ionic dispersant.
Claim 15
Dependent Claim
34 words
A method according to claim 1 wherein said meltable material is applied to said leads and metallic pattern in liquid state, and including the step of hardening said material to form said solid matrix.
References Cited (Backward Citations)
US2470957A
Cited
GB704075A
Cited
GB922596A
Cited
US3117101A
Cited
US2983853A
Cited
US3065099A
Cited
US3158927A
Cited
US3350250A
Cited
US3388465A
Cited
US3538389A
Cited
US3560420A
Cited
US3704515A
Cited
US3780431A
Cited
US3966110A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |