Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2005-06-30
2009-02-03
Webb, Gregory E (Department: 1796)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S500000
Reexamination Certificate
active
07485612
ABSTRACT:
(Object) To provide a new electronic parts cleaning solution that inhibits the corrosion of silicon or metals other than the silicon, and that efficiently cleans off fine dust or organic matters adhered on the surface of electronic parts, and that does not have white turbidity easily.(Solution) An electronic parts clearing solution which is characterized in containing an anionic surfactant, hydroxide, metal corrosion inhibitor, water, and a nonionic surfactant represented by formula (I) and/or a nonionic surfactant represented by formula (II):in-line-formulae description="In-line Formulae" end="lead"?HO-((EO)x—(PO)y)z—H (I)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?R-[((EO)a—(PO)b)c—H]m (II)in-line-formulae description="In-line Formulae" end="tail"?(EO is an oxyethylene group, and PO is an oxypropylene group. x and y, and a and b are positive number, which x(x+y) and a(a+b) are 0.05 to 0.5 respectively, and z and c are positive integers. R is a residue group wherein hydrogen atoms are removed from hydroxyl group of alcohol or amine represented by a group having valency of 1˜4).
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Blakely , Sokoloff, Taylor & Zafman LLP
Dongwoo Fine-Chem Co., Ltd.
Webb Gregory E
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