US PATENT SUBCLASS 252 / 377
.~.~ From elementary nitrogen and hydrogen only or purification

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

Internet Version by PATENTEC © 1999      Terms of Use


252 /   HD   COMPOSITIONS

372  DF  GASEOUS COMPOSITIONS {2}
374  DF  .~ Nitrogen and hydrogen containing {2}
377.~.~ From elementary nitrogen and hydrogen only or purification

DEFINITION

Classification: 252/377

(under subclass 374) Compositions in which the direct sources of the nitrogen and hydrogen are elementary nitrogen and hydrogen only, processes of making such compositions, or processes of purifying compositions which individually contain both elementary nitrogen and elementary hydrogen.