US PATENT SUBCLASS 564 / 65
.~.~.~.~ Preparing directly from ammonia and carbonmonoxide or carbon oxysulfide (e.g., from ammonia and COS, etc.)

Current as of: June, 1999
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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}
32  DF  .~.~ Ureas (i.e., HNH-CO-HNH, wherein substitution may be made for hydrogen only) {9}
63  DF  .~.~.~ Urea per se or salt thereof {5}
65.~.~.~.~ Preparing directly from ammonia and carbonmonoxide or carbon oxysulfide (e.g., from ammonia and COS, etc.)

DEFINITION

Classification: 564/65

(under subclass 63) Processes in which urea is prepared by reacting ammonia with carbon monoxide or carbon oxysulfide.