US PATENT SUBCLASS 564 / 231
.~.~.~.~ Preparing from thioureas

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


564 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}
225  DF  .~.~ Amidines (i.e., HN=CH-HNH, wherein substition may be made for hydrogen only) {5}
230  DF  .~.~.~ Guanidines (i.e., HN=C(-HNH)-HNH, wherein substitution may be made for hydrogen only) {6}
231.~.~.~.~ Preparing from thioureas

DEFINITION

Classification: 564/231

(under subclass 230) Processes wherein a guanidine is prepared from a thiourea, as for example, by reaction with ammonia or an amino nitrogen containing compound in the presence of a desulfurizing agent.