ClassID:

84648

C01B21/0422 - CPC Classification

Classification description:

Nitrogen; Compounds thereof; Purification or separation of nitrogen; Purification or separation processes; Chemical processing only by reduction

Recent Application in this class:
#1
20250346489
2025-11-13

THERMALLY DRIVEN NITROGEN AND AMMONIA PRODUCTION

#2
20220258139
2022-08-18

Photocatalyst comprising bimetallic nanoparticles and graphene oxide for denitrification reaction, and water treatment method using same

#3
20220081295
2022-03-17

SYSTEM AND METHOD FOR ADJUSTING PRESSURE IN A RESERVOIR AND SYSTEM FOR PRODUCING AT LEAST ONE ENERGY CARRIER

#4
20210188636
2021-06-24

THERMALLY DRIVEN NITROGEN AND AMMONIA PRODUCTION

#5
20200165131
2020-05-28

Process for argon and nitrogen production

#6
20190300384
2019-10-03

Single step solution combustion synthesis of crystalline transuranic-doped rare earth zirconate pyrochlores

#7
20190257232
2019-08-22

Bi-metallic oxidation catalyst materials and appurtenant devices and systems

#8
20190078480
2019-03-14

Selective catalytic reduction steady state ammonia slip detection with positive perturbation

#9
20180195426
2018-07-12

Ammonia sensor calibration method

#10
20180080359
2018-03-22

SCR diesel particle filter with oxidation catalyst and oxygen storage catalyst loadings, and exhaust system including the same

#11
20170333841
2017-11-23

Gas purifier

#12
20150151291
2015-06-04

Catalyst and method of manufacture

#13
20150056113
2015-02-26

Gas purifier

#14
20140370125
2014-12-18

Method for producing NO/Ngaseous mixtures intended for the medical field

#15
20140056773
2014-02-27

Oxygen removal

#16
20100247395
2010-09-30

Gas purifying process and device

#17
20100229466
2010-09-16

Oxygen removal

#18
20090060801
2009-03-05

Producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance

#19
20060165573
2006-07-27

Gas purifying process and device

#20
20060000357
2006-01-05

Method and system for producing inert gas from combustion by-products

#21
20050186130
2005-08-25

Method for producing nitrogen to use in under balanced drilling, secondary recovery production operations and pipeline maintenance