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International application No. Applicant's or agent's file reference
PCT/US2021/013298 38136-0923WO1
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
13 January 2021 14 January 2020
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.

A method of making a portion of a microfluidic channel includes lithographically patterning a first pattern (100) into a first layer of photoresist (112) disposed on a substrate (110), the first pattern representative of morphology of a reservoir rock; etching the first pattern into the substrate to form a patterned substrate (118); disposing a second layer of photoresist (120) onto the patterned substrate; lithographically patterning a second pattern (123) into the second layer of photoresist to reveal portions of the patterned substrate; and depositing calcite (132) onto the exposed portions of the patterned substrate; and corresponding microfluidic device (300).

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.


     G03F 1/80 (2012.01)i; B81C 1/00 (2006.01)i; E21B 49/00 (2006.01)i; G03F 7/00 (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):
     G03F; B82B; E21B; B81C
Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched:
Electronic data base consulted during the international search (name of data base and, where practicable, search terms used):
EPO-Internal, WPI Data


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
WO 2019032903 A1 (SAUDI ARABIAN OIL CO [SA]; ARAMCO SERVICES CO [US]) 14 February 2019 (2019-02-14)
paragraph [0014] - paragraph [0028]; figures 1-4
WO 2018085782 A1 (UNIV UTAH RES FOUND [US]) 11 May 2018 (2018-05-11)
column 4, line 23 - column 19, line 26; figures 1-6
US 2019324176 A1 (COLBURN MATTHEW E [US] ET AL) 24 October 2019 (2019-10-24)
paragraph [0020] - paragraph [0099]; figures 1-9
US 2011123771 A1 (STAVIS SAMUEL MARTIN [US] ET AL) 26 May 2011 (2011-05-26)
paragraph [0012] - paragraph [0035]; figures 1-3
Special categories of cited documents:
document defining the general state of the art which is not considered to be of particular relevance
document cited by the applicant in the international application
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
WO 2019032903 A1
14 February 2019
CA 3075166 A1
CN 111108440 A
EP 3665532 A1
JP 2020533620 A
US 2019049847 A1
US 2019250514 A1
WO 2019032903 A1
14 February 2019
05 May 2020
17 June 2020
19 November 2020
14 February 2019
15 August 2019
14 February 2019
WO 2018085782 A1
11 May 2018
US 2019324176 A1
24 October 2019
CN 112219165 A
EP 3785076 A1
US 2019324176 A1
WO 2019209527 A1
12 January 2021
03 March 2021
24 October 2019
31 October 2019
US 2011123771 A1
26 May 2011
US 2011123771 A1
US 2013236698 A1
26 May 2011
12 September 2013
Name and mailing address of the ISA/:
European Patent Office
P.B. 5818, Patentlaan 2, 2280 HV Rijswijk,
Telephone No. (+31-70)340-2040
Facsimile No. (+31-70)340-3016
Date of the actual completion of the international search:
22 April 2021
Date of mailing of the international search report:
11 May 2021
Authorized officer:
Tomezzoli, Giancarlo
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