VERTICAL DIP PRETREATMENT ANDELECTRODEPOSITION SYSTEMU.S. Patent 5,989,401. Nov. 23, 1999T.R. Breneiser et ai., assignors toChrysler Corp., Auburn Hills, Mich.

In a vertical dip pretreatment andelectrodeposition system having aplurality of spray stations and aplurality of dip stations a methodof expanding the system to in­crease the volume throughput.

SELECTIVE nCHING OFNICKEL-IRON ALLOWSU.S. Patent 5,989,443. Nov. 23, 1999K.L. Covert et al., assignors toInternational Business MachinesCorp., Armonk, N. Y.

A method for producing a coppernickel-iron alloy printed circuitboard structure comprising pro­viding a printed circuit boardstructure having a copper layer

and a nickel-iron alloy layer dis­posed on the copper layer; selec­tively etching the nickel-iron alloyby contacting with an aqueousetchant comprising an effectiveamount of etch nickel-iron alloybut not copper, of ferric ammo­nium sulfate; and 0.1 to 10 molarsulfuric acid or phosphoric acid.

STRIPPING TIN AND TIN-LEADFROM COPPERU.S. Patent 5,989,449. Nov. 23, 1999S. Campbell, assignor to MortonInternational Inc., Chicago

A composition for stripping tin ortin-lead alloys and any underly­ing copper-tin intermetallic froma copper surface, the compositioncomprising an aqueous solution ofnitric acid in a range of 5 to 60%by weight; ferric nitrate in a

range of 0.5 to 30%; and a nitricacid stabilizer.

APPARATUS FOR REDUCING AIRENTRAPMENT IN SPRAYAPPLICATIONU.S. Patent 5,989,638. Nov. 23, 1999K.A. Nielsen et al., assignor to UnionCarbide Chemicals & PlasticsTechnology Corp., Danbury, Conn.

A method for liquid spray applica­tion of coatings onto a substrate,which minimizes entrapped non­soluble gaseous bubbles, com­prising spraying without a vis­cosity-reducing diluent undersuper-critical conditions into anenvironment of non-soluble gasor gases.

COLOR-CLEAR COMPOSITECOATINGU.S. Patent 5,989,642. Nov. 23, 1999

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Safety FeaturesA siale-of·the·an flamo moMonng system win shut down the burnershould any allhe followmg events occu,1 Low gas pressure 4. Flame faIlure2 HIgh gas pressure 5 Flame relay mlernal errors

3 Air lallure (loss of combuslion air)

In addition, the burner Will shut down when low level has been readIedm lhe evaporator lank. or when redundanl high temperature mOOltOringIS reponed Fmally. the evaporator utilizes an FM approved gas 1Iam Withdual safety valves

ASM~ SeClionVIIIO,I/,Slon 1Code

API 650

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