US PATENT SUBCLASS 585 / 367
.~.~.~ Using refractory-group metal-containing catalyst

Current as of: June, 1999
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585 /   HD   CHEMISTRY OF HYDROCARBON COMPOUNDS

350  DF  ALICYCLIC COMPOUND SYNTHESIS {11}
365  DF  .~ From nonring hydrocarbon {1}
366  DF  .~.~ Alkadiene {2}
367.~.~.~ Using refractory-group metal-containing catalyst {1}
368  DF  .~.~.~.~> With nonmetal element or compound

DEFINITION

Classification: 585/367

Using refractory-group metal-containing catalyst:

(under subclass 366) Subject matter employing a catalyst which contains in free or combined form a transition metal of Group IV, V, or VI, that is, titanium, zirconium, hafnium, vanadium, niobium (columbium), tantalum, chromium, molybdenum, or tungsten.