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International application No. Applicant's or agent's file reference
PCT/EP2018/075152 00171217WO01
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
18 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.

A process for concentrating graphite particles comprising a) providing a feedstock which contains the graphite particles and an undesired material, b) adding hydrophobic magnetic particles to the feedstock which results in a loaded feedstock containing agglomerates of the magnetic particles and the graphite particles, and c) separating the agglomerates from the loaded feedstock by a magnetic field which results in isolated agglomerates.

6. Drawings
The figure of the drawings to be published with the abstract is Figure No. ____________
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.


     B03C 1/01 (2006.01)i; B03C 1/00 (2006.01)i; H01F 1/00 (2006.01)i; C01B 32/20 (2017.01)i
According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
     B03C; C01C; H01F; C01B
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.
US 5161694 A (YOON ROE-HOAN [US] ET AL) 10 November 1992 (1992-11-10)
claims 1,9,10,21,22
EP 3181230 A1 (BASF SE [DE]) 21 June 2017 (2017-06-21)
paragraphs [0085], [0087]
WO 2016083491 A1 (BASF CORP [US]; BASF SE [DE]) 02 June 2016 (2016-06-02)
cited in the application
page 18, line 6 - page 27, line 17
WO 2016083575 A1 (BASF SE [DE]) 02 June 2016 (2016-06-02)
page 10, line 8 - page 25, line 5
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
US 5161694 A
10 November 1992
EP 3181230 A1
21 June 2017
AU 2016372085 A1
CA 3006843 A1
CN 108367300 A
EP 3181230 A1
EP 3389872 A1
PE 14652018 A1
WO 2017102512 A1
14 June 2018
22 June 2017
03 August 2018
21 June 2017
24 October 2018
13 September 2018
22 June 2017
WO 2016083491 A1
02 June 2016
AU 2015352482 A1
CA 2967215 A1
CL 2017001308 A1
CN 107206392 A
EP 3223953 A1
PE 08042017 A1
US 2017274389 A1
WO 2016083491 A1
01 June 2017
02 June 2016
09 February 2018
26 September 2017
04 October 2017
04 July 2017
28 September 2017
02 June 2016
WO 2016083575 A1
02 June 2016
AU 2015352396 A1
CA 2966807 A1
CL 2017001293 A1
CN 107073479 A
EP 3223952 A1
PE 08122017 A1
US 2017320068 A1
WO 2016083575 A1
01 June 2017
02 June 2016
12 January 2018
18 August 2017
04 October 2017
04 July 2017
09 November 2017
02 June 2016
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:
14 November 2018
Date of mailing of the international search report:
22 November 2018
Authorized officer:
Menck, Anja
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