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International application No. Applicant's or agent's file reference
PCT/GB2018/052140 TAW_WOP2018A
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
27 July 2018 11 August 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 dirt separator for a vacuum cleaner comprising a chamber (36) having an inlet (37) through which dirt-laden fluid enters and an outlet (38) through which cleansed fluid exits the chamber (36). A disc (40) located at the outlet 38 rotates about a rotational axis (48) and comprises holes (47) through which the cleansed fluid passes. The inlet (37) is defined by an end of an inlet duct (21) that extends within the chamber (38), and a separation distance between the centre of the inlet (37) and the centre of the disc (40) is no greater than the diameter of the inlet.

6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     3    
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.


     A47L 9/10 (2006.01)i; A47L 5/24 (2006.01)i; A47L 9/16 (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):
     A47L; B01D
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.
DE 19637431 A1 (KIEFER GMBH [DE]) 19 March 1998 (1998-03-19)
column 3, line 27 - column 4, line 35; figures
WO 9922844 A1 (SHARPE JOHN ERNEST ELSOM [GB]) 14 May 1999 (1999-05-14)
page 16 - page 18; figure 6
US 1664092 A (JOHN SQUIRES) 27 March 1928 (1928-03-27)
page 1, line 70 - page 2, line 43; figures 1,3
US 1420665 A (NEWCOMBE JOHN W) 27 June 1922 (1922-06-27)
page 1, line 74 - page 2, line 113; figure 1
US 2015135474 A1 (GIDWELL CHRISTOPHER [US]) 21 May 2015 (2015-05-21)
paragraph [0037] - paragraph [0038]; figures 1,2
GB 2542386 A (DYSON TECHNOLOGY LTD [GB]) 22 March 2017 (2017-03-22)
abstract; figures 1,2,6,8
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
DE 19637431 A1
19 March 1998
WO 9922844 A1
14 May 1999
AU 9753498 A
CA 2303491 A1
CN 1278745 A
EP 1027130 A1
JP 2001521811 A
WO 9922844 A1
24 May 1999
14 May 1999
03 January 2001
16 August 2000
13 November 2001
14 May 1999
US 1664092 A
27 March 1928
US 1420665 A
27 June 1922
US 2015135474 A1
21 May 2015
AU 2015202958 A1
CA 2932322 A1
CN 107105951 A
EP 3071084 A1
JP 2017500094 A
KR 20160114576 A
US 2015135474 A1
WO 2015077802 A1
19 May 2016
28 May 2015
29 August 2017
28 September 2016
05 January 2017
05 October 2016
21 May 2015
28 May 2015
GB 2542386 A
22 March 2017
AU 2016321998 A1
CA 2998696 A1
CN 106859484 A
EP 3349632 A1
GB 2542386 A
JP 2017056202 A
KR 20180039153 A
US 2017079490 A1
WO 2017046558 A1
08 March 2018
23 March 2017
20 June 2017
25 July 2018
22 March 2017
23 March 2017
17 April 2018
23 March 2017
23 March 2017
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:
25 September 2018
Date of mailing of the international search report:
05 October 2018
Authorized officer:
Masset, Markus
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