US PATENT SUBCLASS 546 / 260
.~.~.~.~.~ Metal containing catalyst utilized


Current as of: June, 1999
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546 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
*  DD  .~ HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1) {1}
1  DF  .~.~ Hetero ring is six-membered consisting of one nitrogen and five carbons {24}
255  DF  .~.~.~ Plural pyridine or partially hydrogenated pyridine rings {6}
257  DF  .~.~.~.~ Pyridine or partially hydrogenated pyridine rings are bonded directly to each other {2}
260.~.~.~.~.~ Metal containing catalyst utilized


DEFINITION

Classification: 546/260

Metal containing catalyst utilized:

(under subclass 257) Processes utilizing a metal or metal containing compound as catalyst.