US PATENT SUBCLASS 556 / 53
.~.~.~.~ Plural unsaturated 5-membered carbocyclic rings bonded directly to the metal

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {3}
1  DF  .~ HEAVY METAL CONTAINING (e.g., Ga, In or T1, etc.) {19}
51  DF  .~.~ Titanium, zirconium, or hafnium containing (Ti, Zr, or Hf) {2}
52  DF  .~.~.~ Carbon bonded directly to the metal {1}
53.~.~.~.~ Plural unsaturated 5-membered carbocyclic rings bonded directly to the metal

DEFINITION

Classification: 556/53

(under subclass 52) Compounds wherein at least two unsaturated 5-membered carbocyclic rings are bonded directly to the metal.