ClassID:

160411

F25J2215/44 - CPC Classification

Classification description:

Processes characterised by the type or other details of the product stream; Nitrogen or special cases, e.g. multiple or low purity N Ultra high purity nitrogen, i.e. generally less than 1 ppb impurities

Recent Application in this class:
#1
20200149806
2020-05-14

SYSTEM AND METHOD FOR ENHANCED RECOVERY OF ARGON AND OXYGEN FROM A NITROGEN PRODUCING CRYOGENIC AIR SEPARATION UNIT

#2
20190331416
2019-10-31

System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit

#3
20180306497
2018-10-25

Nitrogen production system for producing nitrogen with different purities and nitrogen production process thereof

#4
20180149426
2018-05-31

Process for increasing low pressure pure nitrogen production by revamping original apparatus for cryogenic air separation

#5
20170299261
2017-10-19

Liquid nitrogen production

#6
20110259194
2011-10-27

System for preventing contaminants from reaching a gas purifier

#7
20110259047
2011-10-27

Method and apparatus for producing nitrogen by cryogenic distillation of air

#8
20110120185
2011-05-26

METHODS FOR PRODUCING STERILE CRYOGENIC FLUIDS

#9
20100115994
2010-05-13

ADSORBENT FOR CARBON MONOXIDE, GAS PURIFICATION METHOD, AND GAS PURIFICATION APPARATUS

#10
20090120294
2009-05-14

System for preventing contaminants from reaching a gas purifier

#11
20090013718
2009-01-15

METHOD FOR THE SIMULTANEOUS RECOVERY OF A PURE HELIUM AND PURE NITROGEN FRACTION

#12
20080134716
2008-06-12

Method for Separating Trace Components from a Nitrogen-Rich Stream

#13
20070204650
2007-09-06

Self-contained distillation purifier/superheater for liquid-fill product container and delivery systems

#14
20060210454
2006-09-21

Production of high purity and ultra-high purity gas

#15
12800637
2017-08-08

Liquid nitrogen production