US PATENT SUBCLASS 585 / 353
.~ By shift, opening, or removal of shared-carbon ring

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

350  DF  ALICYCLIC COMPOUND SYNTHESIS {11}
353.~ By shift, opening, or removal of shared-carbon ring {2}
354  DF  .~.~> Cyclopentadiene from its polymer
355  DF  .~.~> Camphene or ten-C monocyclic from polycyclic, e.g., terpene isomerization, etc. {1}

DEFINITION

Classification: 585/353

By shift, opening, or removal of shared-carbon ring:

(under subclass 350) Subject matter in which a shared-carbon ring, e.g., a bridge, is shifted from attachment to one

carbon of a ring to another carbon, as in terpene isomerization, or a shared-carbon ring is opened or removed to give a product containing fewer rings than the feed material.

(1) Note. The polycyclic feed may have ortho-fused rings or one ring may bridge another, or the rings may be spiro.

SEE OR SEARCH THIS CLASS, SUBCLASS:

476, for the synthesis of an aromatic compound by ring opening, removal, degradation, or shift.

940, for a collection of patents in which a hydrocarbon ring is opened.