PATENTS GRANTED

In the Metal Finishing Field Printed copies of patents are furnished by the Patent and Trademark Office for $3.00 each Address orders to: Commissioner of Patents and Trademarks, Washington. D.C. 2023 I.

Sputtering Apparatus U.S. Pafent 5,620,578. Apr. 15, 1997 S. /-/u&f, assignor fo Sony Corp., Tokyo and Materfak Research Corp., Orangeburg, N. Y.

A sputtering apparatus having an on-

board service module.

Plating Apparatus U.S. Patent 5,620,581. Apr. 15. 1997 J. Ang. assignor to A/WA Research and Development Inc., Fremont Calf.

An apparatus for electroplating metal

films including a cathode ring, insulator ring, and thief ring.

Process for Architectural Anodizing US. Patent 5,620.W Apr. 15 1997 M.M. Lemer, Needham, Mass.

A method for architectural anodizing at least one aluminum or aluminum alloy ar- ticle comprising Immersing in an electro

lyte composed of an aqueous solution of an acid; applying for a time interval across the article and a cathode a DC voltage compo- nent with a superimposed AC voltage com-

ponent, the positive potential of the DC voltage component bein:: applied to the article and the negative potential of the DC

voltage component bein:: applied to the cathode; where the DC voltage component

has a value during at least a portion of the

time interval substantially in the range of 6 to IO V and is the highest DC voltage applied during the time interval to the arti-

cle, with the superimposed AC voltage component being generated w’ith three \tar- connected, one-phase transformer,.

Platinum Plating Bath U.S. Pafent 5,620,5&V Apr. 15. 1997 W Kuhn and W Zilske, assignors to Degussa AG, Frankfurt am Main, Germany

A method of depositing platinum on an

article comprising placing the article in a platinum electroplating bath comprising 5 to 30 g/L platinum ions as amminesulfa-

76 t!9+ C-12 ACTIVATOR

for nickel, silver, chrome, gold, copper, paint, glass, and ceramics.

all meQ4.llI.r oxties to uwlJz perfect ~QuJ. 100% adhmon over 1st . . . . .

soat. Passlva+lon 1s ehumteL

controls, retards, and stabilizes sodium carbonates

in any cyanide plating bath.

NorId Wide Distributors

Circle 062 on reader information card

Technic’s Platinum CladAnodes Providing longer anode life with results equal to solid platinum at significant savings.

Anode materials cross sectlons (500x) metallurgical’ bond

l Longer life than electroplated anodes

II Plal,““m Clad I’iamum Electroplated l Excellent for high Expanded Mesh voltage appiications &“diamond shaped openings in widths up to 6” l ideal for cathodic

Woven Material protection Clad wire woven in a IO x 10 mesh pattern available in l Perfect for precious widths up to 36” metal elec tropfa ting

Wire and Rod and accountability Available in a wide variety of diameters.lengths and shapes.

EOUIPMENT DlVl5lON

Conlorming anodes 55Maryland Avenue,Pawtucket,RI02860 made on request Tel: (401)728-7081 Fax(401)722-1720

Circle 077 on reader information card

METAL FINISHING l JANUARY 1998 85