ClassID:

93187

C07C273/12 - CPC Classification

Classification description:

Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds combined with the synthesis of melamine

Recent Application in this class:
#1
20260116850
2026-04-30

A PROCESS AND PLANT FOR THE SYNTHESIS OF UREA AND MELAMINE

#2
20260062392
2026-03-05

MELAMINE PROCESS WITH PURIFICATION OF MELAMINE OFFGAS

#3
20260001852
2026-01-01

UREA MELAMINE PLANT WITH MELAMINE OFF-GAS CONDENSER

#4
20240327358
2024-10-03

Coupled urea melamine plant

#5
20240270685
2024-08-15

Coupled urea melamine production with HP COstripping

#6
20240270684
2024-08-15

PRODUCTION OF UREA AND MELAMINE

#7
20240262798
2024-08-08

A PROCESS AND PLANT FOR THE SYNTHESIS OF UREA AND MELAMINE

#8
20240262789
2024-08-08

Multiproduct low biuret urea production

#9
20240262788
2024-08-08

Urea and melamine production

#10
20210261498
2021-08-26

CONVERSION PROCESS OF ANHYDROUS OFF-GAS STREAM COMING FROM MELAMINE SYNTHESIS PLANTS INTO UREA

#11
20180099926
2018-04-12

Method and system for the integrated production of urea and melamine

#12
20180071708
2018-03-15

Sonication in a urea or melamine synthesis process

#13
20170362188
2017-12-21

Integrated production of urea and melamine

#14
20170081297
2017-03-23

Process and plant for the synthesis of urea and melamine

#15
20160318883
2016-11-03

Integrated production of urea and melamine

#16
20160194293
2016-07-07

Integrated process for urea and melamine production

#17
20140005436
2014-01-02

Method for treating offgases from a melamine plant

#18
20110009630
2011-01-13

PROCESS FOR THE PREPARATION OF MELAMINE

#19
20100069631
2010-03-18

Integrated Process for Urea and Melamine Production

#20
20090069597
2009-03-12

Method for concentrating an aqueous ammonium carbamate stream

#21
20070282102
2007-12-06

Integrated process for urea and melamine production

#22
20070032650
2007-02-08

Integrated process for urea and melamine production

#23
20060052637
2006-03-09

Integrated process for urea/melamine production and related plant

#24
20050288529
2005-12-29

Process for increasing the capacity of a urea plant