US PATENT SUBCLASS 560 / 347
.~.~.~.~ Carbonyl dihalide reactant (e.g., phosgene, etc.)

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

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {17}
330  DF  .~ Isocyanate esters (i.e., compounds containing the isocyanate group, -N=C=O, bonded directly to carbon, which carbon may be single bonded to any atom but may be multiple bonded only to carbon) {7}
336  DF  .~.~ Processes {6}
338  DF  .~.~.~ Processes for forming the isocyanate group {9}
347.~.~.~.~ Carbonyl dihalide reactant (e.g., phosgene, etc.)

DEFINITION

Classification: 560/347

(under subclass 338) Processes wherein there is utilized a carbonyl dihalide reactant, X-C(=O)-X, wherein X represents halogen.

(1) Note. The classical isocyanate synthesis phosgenation of an amine, is provided for herein.