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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Elias; Moenes L.
Address:
Canfield, OH
No. of patents:
10
Patents:












Patent Number Title Of Patent Date Issued
4525240 Dissolution of metals utilizing tungsten June 25, 1985
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of tungsten.
4522683 Dissolution of metals utilizing tungsten-diol combinations June 11, 1985
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and combinations of catalytic amounts of tungsten and of certain diols.
4437931 Dissolution of metals March 20, 1984
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and certain primary diols.
4297257 Metal stripping composition and method October 27, 1981
A composition for stripping solder and tin from a copper substrate having an extended life is provided by the inclusion of a polyacrylamide in a peroxide-fluoride based stripping composition. The presence of the polyacrylamide minimizes the adverse effect of the stripping composition
4236957 Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.Y --H.sub.2 O.sub. -mercapto containin December 2, 1980
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a heterocyclic nitrogen compound containing at least one free mercapto group substitution.
4233113 Dissolution of metals utilizing an aqueous H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 -thioamide etchant November 11, 1980
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a thioamide having the general formula ##STR1## wherein R is an aryl or a heterocyclic group.
4233112 Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.sub.2 O.sub.2 -polysulfide etchan November 11, 1980
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a polysulfide compound having the general formula ##STR1## wherein R is a hydroxyl group, a carboxyl group, a sulfonic acid group or a sulfoni
4233111 Dissolution of metals utilizing an aqueous H.sub.2 SO.sub.4 -H.sub.2 O.sub.2 -3-sulfopropyldithi November 11, 1980
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of 3-sulfopropyldithiocarbamate sodium salt having the general formula ##STR1## wherein R can be a C.sub.1 -C.sub.4 alkyl group, phenyl, a C.sub.7
4174253 Dissolution of metals utilizing a H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 solution catalyzed with hydr November 13, 1979
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and an effective amount of a mono- or dihydroxy-substituted cycloparaffin.
4130455 Dissolution of metals-utilizing H.sub.2 O.sub.2 -H.sub.2 SO.sub.4 -thiosulfate etchant December 19, 1978
Improved metal dissolution rates are obtained when using a solution containing sulfuric acid, hydrogen peroxide and a catalytic amount of a thiosulfate of sodium or potassium.










 
 
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