US PATENT SUBCLASS 552 / 309
.~.~ Carbon donded directly at the 2-, 3-, 5- or 6- position

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

*  DD  ORGANIC COMPOUNDS (Class 532, subclass 1) {11}
293  DF  .~ Cyclohexadiene having atoms double bonded directly at the 1- and 4- positions (e.g., paraquinones, etc.) {11}
309.~.~ Carbon donded directly at the 2-, 3-, 5- or 6- position {1}
310  DF  .~.~.~> At least three carbons bonded directly to the cyclohexadiene

DEFINITION

Classification: 552/309

(under subclass 293) Compounds wherein carbon is bonded

directly to any of the remaining positions of the cyclohexadiene ring (i.e., 2-, 3-, 5-, or 6- position).

(1) Note. This subclass contains, for example: [figure] [figure]