US PATENT SUBCLASS 534 / 12
.~.~.~ Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl containing, etc.)

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

*  DD  ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8}
10  DF  .~ RADIOACTIVE METAL CONTAINING (At. No. 43, 61 or 84+; or radioactive isotope of another metal) {2}
11  DF  .~.~ Actinide series metal (At. No. 89+) {1}
12.~.~.~ Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl containing, etc.) {1}
13  DF  .~.~.~.~> The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens

DEFINITION

Classification: 534/12

(under subclass 11) Compounds which contain a -C(=X)- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium).