US PATENT SUBCLASS 501 / 51
.~.~.~.~.~ And zirconium, titanium, tantalum, or niobium

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

Internet Version by PATENTEC © 1999      Terms of Use


501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
11  DF  .~ Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions {11}
41  DF  .~.~ Nonsilicate oxide glasses {4}
49  DF  .~.~.~ Boron containing {2}
50  DF  .~.~.~.~ And yttrium or rare earth (i.e., elements with atomic numbers 39, 57-71, or 89+) {1}
51.~.~.~.~.~ And zirconium, titanium, tantalum, or niobium

DEFINITION

Classification: 501/51

And zirconium, titanium, tantalum, or niobium:

(under subclass 50) Compositions additionally containing zirconium, titanium, tantalum, or niobium, or a compound of any of these elements.