US Patent No: 5,234,506
Number of patents in Portfolio can not be more than 2000
Aqueous electronic circuit assembly cleaner and method
Stats
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Aug 10, 1993
Issued date -
Jun 10, 1992
filing date -
07/896,660
serial no -
In Force
status
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Abstract
The present invention relates to environmentally safe aqueous cleaning compositions for cleaning electronic circuit assemblies, such as printed circuit or printed wiring boards, during their fabrication. Alkali metal carbonate and bicarbonate salts are utilized with an alkali metal silicate to achieve a variety of objectives, among which are the removal of solder flux, oils, waxes, and greasy substances, adhesives and other residues as well as provide anti-corrosion protection and metal brightening.
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,283,299 Production of detergent compositions | 20 | 1979 | |
| 4,457,322 Alkaline cleaning compositions non-corrosive toward aluminum surfaces | 40 | 1983 | |
| 4,539,133 Process for preparation of an anti-corrosive aqueous liquid detergent composition | 18 | 1984 | |
| 4,528,039 Alkaline cleaning compositions non-corrosive toward aluminum surfaces | 51 | 1984 | |
| 4,783,281 Detergent powder and process for its preparation | 23 | 1986 | |
| 4,820,441 Process for the preparation of a granular detergent composition | 44 | 1988 | |
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| 4,304,680 Laundry soap | 21 | 1977 | |
| 4,214,915 Method and composition for cleaning ovens | 22 | 1978 | |
| 4,347,152 Phosphate-free concentrated particulate heavy duty laundry detergent | 39 | 1980 | |
| 4,362,640 Method for retarding gelation of crutcher slurries containing bicarbonate, carbonate and silicate | 28 | 1981 | |
| 5,108,641 Aqueous liquid automatic dishwasher detergent composition containing dual bleach system | 19 | 1991 | |
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| 4,820,440 Phosphate-free dishwasher detergent | 39 | 1987 | |
| 4,844,744 Liquid, phosphate-free single phase degreasing compositions | 34 | 1988 | |
| 4,869,844 High solids liquid alkaline cleaners | 19 | 1989 | |
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| 4,382,825 Alkaline cleaner for ferrous-based metal surfaces | 32 | 1981 | |
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| 4,521,332 Highly alkaline cleaning dispersion | 46 | 1982 | |
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| 5,096,609 Detergent containing sodium disilicate having a water content of 0.3 to 6% by weight | 18 | 1991 | |
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| 4,228,048 Foam cleaner for food plants | 32 | 1979 | |
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| 4,756,846 Alkaline tin-plate degreasing detergent | 22 | 1987 | |
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| 4,554,026 Aqueous hydrotrope solutions for paint detackifiers | 26 | 1984 | |
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| 5,015,408 Denture cleaning tablet containing a bleach activator and an organic phosphonic acid stabilizer | 67 | 1989 | |
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| 4,741,863 Alkaline degreasing solution comprising amine oxides | 26 | 1986 | |
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| 4,434,069 Plastic bottle cleaner | 22 | 1982 | |
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| 5,049,200 Process for the hydrophilizing and/or cement-residue-removing surface treatment of silicon wafers | 27 | 1988 | |
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| 4,348,292 Multi-layered liquid detergent-builder concentrate compositions which on addition to water produce stable cleaning solutions | 50 | 1980 | |