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Part 1:  1  2  3  4  5  6          Part 2:  A  B  C  D  E 
International application No. Applicant's or agent's file reference
PCT/US2018/052394 121-82-PCT
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
24 September 2018 29 September 2017
FOR FURTHER ACTION: See Form PCT/ISA/220 as well as, where applicable, item 5 below.
This international search report has been prepared by this International Searching Authority and is transmitted to the applicant according to Article 18. A copy is being transmitted to the International Bureau.
It is also accompanied by a copy of each prior art document cited in this report.
1. Basis of the report
a. With regard to the language, the international search was carried out on the basis of:
the international application in the language in which it was filed.
a translation of the international application into                                          which is the language of a translation furnished for the purposes of international search (Rules 12.3(a) and 23.1(b)).
This international search report has been established taking into account the rectification of an obvious mistake authorized by or notified to this Authority under Rule 91 (Rule 43.6bis(a)).
With regard to any nucleotide and/or amino acid sequence disclosed in the international application, the international search was carried out on the basis of a sequence listing:
2. Certain claims were found unsearchable
3. Unity of invention is lacking
4. Title of the invention
The text is approved as submitted by the applicant.
The text has been established by this Authority to read as follows:
5. Abstract
The text is approved as submitted by the applicant.
The text has been established, according to Rule 38.2, by this Authority as it appears in Box No. IV. The applicant may, within one month from the date of mailing of this international search report, submit comments to this Authority.
6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     1    
as suggested by the applicant.
as selected by this Authority, because the applicant failed to suggest a figure.
as selected by this Authority, because this figure better characterizes the invention.
none of the figures is to be published with the abstract.


     C10L 3/08 (2006.01)i; C10K 1/00 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Korean utility models and applications for utility modelsJapanese utility models and applications for utility models
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
eKOMPASS(KIPO internal) & Keywords: purified hydrogen gas stream, air, oxidizer, nitrogen gas, H2 to CO ratio, N2 removal unit, CO2 removal unit, tail gas


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
EP 2233433 A1 (HYDROGEN ENERGY INTERNATIONAL LIMITED) 29 September 2010 See paragraphs [0006]-[0048], [0068]; claim 1; and figure 2.
US 2014-0163121 A1 (ALLAM, RODNEY J.) 12 June 2014 See paragraphs [0018]-[0028]; claim 1; and figure 1.
US 4846851 A (GURO, DAVID E. et al.) 11 July 1989 See columns 4, 5; claim 1; and figure 1.
WO 2015-015433 A1 (COMMISSARIAT A L`ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES) 05 February 2015 See abstract; and claims 1-16.
US 2016-0045861 A1 (HALDOR TOPSOE A/S) 18 February 2016 See paragraphs [0016]-[0051]; and claim 1.
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
earlier application or patent but published on or after the international filing date
document which may throw doubts on priority claim(s) or which is cited to establish the publication date of another citation or other special reason (as specified)
document referring to an oral disclosure, use, exhibition or other means
document published prior to the international filing date but later than the priority date claimed
later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention
document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone
document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art
document member of the same patent family


Patent document cited in search report Publication date
Patent family member(s) Publication date
EP 2233433 A1
29 September 2010
WO 2010-109181 A1
30 September 2010
US 2014-0163121 A1
12 June 2014
AU 2009-259856 A1
AU 2009-259856 B2
CA 2728160 A1
CN 102105570 A
CN 102105570 B
EP 2294164 A2
RU 2011101927 A
RU 2495914 C2
US 2010-0022668 A1
US 2012-0059072 A1
US 7989509 B2
US 8445549 B2
WO 2009-155554 A2
WO 2009-155554 A3
23 December 2009
24 December 2015
23 December 2009
22 June 2011
19 March 2014
16 March 2011
27 July 2012
20 October 2013
28 January 2010
08 March 2012
02 August 2011
21 May 2013
23 December 2009
08 April 2010
US 4846851 A
11 July 1989
WO 2015-015433 A1
05 February 2015
BR 112016002207 A2
DK 3027715 T3
EP 3027715 A1
EP 3027715 B1
ES 2648258 T3
FR 3009308 A1
FR 3009308 B1
01 August 2017
04 December 2017
08 June 2016
06 September 2017
29 December 2017
06 February 2015
11 September 2015
US 2016-0045861 A1
18 February 2016
AU 2012-278043 A1
AU 2012-278043 B2
AU 2015-261575 A1
AU 2015-261575 B2
AU 2016-204971 A1
AU 2016-204971 B2
BR 112013033570 A2
CA 2838849 A1
CN 103748033 A
CN 103748033 B
CN 106957674 A
EA 025435 B1
EA 030771 B1
EA 201490176 A1
EA 201691199 A1
EP 2594527 A1
KR 10-1920775 B1
KR 10-2014-0043923 A
MX 2013015028 A
US 2014-0135409 A1
US 2016-0046488 A1
US 2017-0002281 A1
US 9162886 B2
WO 2013-000782 A2
WO 2013-000782 A3
ZA 201309616 B
16 January 2014
07 January 2016
10 December 2015
06 April 2017
04 August 2016
12 January 2017
19 December 2017
03 January 2013
23 April 2014
07 December 2016
18 July 2017
30 December 2016
28 September 2018
30 April 2014
31 October 2016
22 May 2013
21 November 2018
11 April 2014
24 January 2014
15 May 2014
18 February 2016
05 January 2017
20 October 2015
03 January 2013
04 April 2013
29 April 2015
Name and mailing address of the ISA/:
Korean Intellectual Property Office
189 Cheongsa-ro, Seo-gu, Daejeon Metropolitan City, 302-701
Republic of Korea
Facsimile No. +82-42-481-8578
Date of the actual completion of the international search:
13 March 2019
Date of mailing of the international search report:
13 March 2019
Authorized officer:
Telephone No. +82-42-481-3371
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