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International application No. Applicant's or agent's file reference
PCT/CN2019/092541 IDE19P10573
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
24 June 2019 24 June 2018
Nano and Advanced Materials Institute Limited
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 multi-layered, food-safe, and non-stick coating comprising at least one silica gel layer(202) and at least one polydimethylsiloxane-based layer being coated on a substrate(201) is provided, wherein the silica gel layer(202) is superhydrophobic and prepared by adding hexamethyldisilazane into an aged silica sol formed by hydrolysis and condensation of tetraethyl orthosilicate(203b) in a mixture of ethanol, ammonia and water, and the polydimethylsiloxane-based layer is hydrophobic and prepared by partially cross-linking silane moieties of polydimethylsiloxane(203a) with tetraethyl orthosilicate(203b) such that polydimethylsiloxane(203a) is silanol-terminated and covalently grafted onto said silica gel layer(202), and the substrate(201) coated with the multi-layered, food-safe, and non-stick coating has a contact angle of at least 50° with respect to a viscous food substance.

6. Drawings
The figure of the drawings to be published with the abstract is Figure No.     2A    
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.


According to International Patent Classification (IPC) or to both national classification and IPC


Minimum documentation searched (classification system followed by classification symbols):
     B32B; C09D
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):
CNABS, CNTXT, DWPI, SIPOABS, USTXT, CNKI: NANO 1w ADVANCED MATERIALS, coat+, layer?, stick, adhesive, silica, SiO2, pdms, polydimethylsiloxane


Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
WO 2007/104258 A1 (CERASOL HONG KONG LTD. ET AL.) 20 September 2007 (2007-09-20)
page 5 paragraph 2 to page 8 paragraph 4, claims 1-35
CN 104672962 A (HEBEI UNIVERSITY OF TECHNOLOGY) 03 June 2015 (2015-06-03)
paragraphs [0004]-[0021]
CN 104057670 A (ZHEJIANG PFLUON TECHNOLOGY CO., LTD.) 24 September 2014 (2014-09-24)
paragraphs [0003]-[0028]
CN 103804959 A (HANGZHOU JIHUA HIGH POLYMER MATERIAL CO.) 21 May 2014 (2014-05-21)
paragraphs [0005]-[0025]
CN 103465574 A (ZHEJIANG PFLUON CHEMICAL CO., LTD. ET AL.) 25 December 2013 (2013-12-25)
paragraphs [0005]-[0040]
US 2018/0086919 A1 (SEB S.A.) 29 March 2018 (2018-03-29)
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 2007/104258 A1
20 September 2007
EP 1835002 B1
CA 2581474 A1
EP 1835002 A2
EP 1835002 A3
CN 101037351 A
US 8741440 B2
US 2014186639 A1
RU 2424253 C2
AU 2007224853 A8
CN 101037351 B
US 2007218297 A1
AU 2007224853 A1
RU 2008136775 A
US 7879449 B2
AU 2007224853 B2
AU 2012227320 B2
ES 2510671 T3
US 2011293950 A1
23 July 2014
14 September 2007
19 September 2007
21 May 2008
19 September 2007
03 June 2014
03 July 2014
20 July 2011
19 January 2012
05 December 2012
20 September 2007
02 October 2008
20 April 2010
01 February 2011
22 November 2012
18 July 2013
21 October 2014
01 December 2011
CN 104672962 A
03 June 2015
CN 104672962 B
16 November 2016
CN 104057670 A
24 September 2014
CN 103804959 A
21 May 2014
CN 103804959 B
12 August 2015
CN 103465574 A
25 December 2013
CN 103465574 B
26 August 2015
US 2018/0086919 A1
29 March 2018
JP 2018524445 A
BR 112017026571 A2
FR 3037965 B1
CN 107810245 A
EP 3313797 A1
WO 2016207563 A1
KR 20180022819 A
FR 3037965 A1
EP 3313797 B1
30 August 2018
14 August 2018
14 July 2017
16 March 2018
02 May 2018
29 December 2016
06 March 2018
30 December 2016
20 March 2019
Name and mailing address of the ISA/:
National Intellectual Property Administration, PRC
6, Xitucheng Rd., Jimen Bridge, Haidian District, Beijing 100088
Facsimile No. (86-10)62019451
Date of the actual completion of the international search:
02 September 2019
Date of mailing of the international search report:
18 September 2019
Authorized officer:
Telephone No. 86-(10)-53962760
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