U.S. Organic compounds -- part of the class 532-570 series Patents and Patent Applications (Class 549) - Justia Patents Search

Organic Compounds -- Part Of The Class 532-570 Series Patents (Class 549)

Organic compounds (class 532, subclass 1)

HETEROCYCLIC CARBON COMPOUNDS CONTAINING A HETERO RING HAVING CHALCOGEN (I.E., OXYGEN, SULFUR, SELENIUM, OR TELLURIUM) OR NITROGEN AS THE ONLY RING HETERO ATOMS (Class 540, subclass 1)

Foreign Patent Art Collections

Class-related foreign documents (Class 549/FOR000)