US PATENT SUBCLASS 148 / 672
.~.~.~ Zirconium(Zr) or zirconium base alloy

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


148 /   HD   METAL TREATMENT

95  DF  PROCESS OF MODIFYING OR MAINTAINING INTERNAL PHYSICAL STRUCTURE (I.E., MICROSTRUCTURE) OR CHEMICAL PROPERTIES OF METAL, PROCESS OF REACTIVE COATING OF METAL AND PROCESS OF CHEMICAL-HEAT REMOVING (E.G., FLAME-CUTTING, ETC.) OR BURNING OF METAL {17}
559  DF  .~ Heating or cooling of solid metal {22}
668  DF  .~.~ Refractory metal (i.e., titanium(Ti), zirconium(Zr), hafnium(Hf), vanadium(V), niobium(Nb), columbium(Cb), tantalum(Ta), chromium(Cr), molybdenum(Mo), tungsten(W)), or alloy base thereof {3}
672.~.~.~ Zirconium(Zr) or zirconium base alloy

DEFINITION

Classification: 148/672

Zirconium (Zr) or zirconium base alloy:

(under subclass 668) Process wherein the metal being treated is zirconium (Zr) or a zirconium alloy containing greater than 50 percent zirconium.