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1. (WO2019032217) COILED AND TWISTED NANOFIBER YARNS FOR ELECTROCHEMICALLY HARVESTING ELECTRICAL ENERGY FROM MECHANICAL DEFORMATION



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INTERNATIONAL SEARCH REPORT (ISR)
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/US2018/039961 072169-32001
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
28 June 2018 28 June 2017
Applicant
BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
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)).
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)).
c.
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
This International Searching Authority found multiple inventions in this international application, as follows:
1. claims: 1-71
The special technical features, representing the contribution over the above mentioned prior art, of claim 1 are: first and second electrodes immersed in an electrolyte and with an ionic conductivity path between the electrodes, wherein at least one electrode comprises a twisted, high-electrochemical-surface-area, conductive yarn. These distinguishing special technical feature results in that vibrational mechanical energy can be stored as electrical energy in and released from the yarn by tensioning the yarn. The problem to be solved may be therefore regarded as to provide a simplified energy harvester that can store tensional energy.
2. claims: 72-79
The special technical features, representing the contribution over the above mentioned prior art, of claim 72 are: first and second electrodes immersed in an electrolyte and with an ionic conductivity path between the electrodes, wherein a twisted yarn electrode can change its level of inserted twist, thus enabling the harvesting of torsional mechanical energy. These distinguishing special technical feature results in that vibrational mechanical energy can be stored as electrical energy in and released from the yarn by torsion the yarn. The problem to be solved may be therefore regarded as to provide a simplified energy harvester that can store torsional energy.
3. claims: 80-83
The special technical features, representing the contribution over the above mentioned prior art, of claim 80 are that: the electrochemical mechanical energy harvester is a "twistron" fiber harvester with a stretchable fiber supercapacitor. These distinguishing special technical features result in that vibrational mechanical energy can be stored as electrical energy in and released from the capacitor like yarn. The problem to be solved may be therefore regarded as to provide a simplified energy harvester that can store capacitance energy.
1.
As all required additional search fees were timely paid by the applicant, this international search report covers all searchable claims.
2.
As all searchable claims could be searched without effort justifying additional fees, this Authority did not invite payment of additional fees.
3.
As only some of the required additional search fees were timely paid by the applicant, this international search report covers only those claims for which fees were paid, specifically claims Nos.:
4.
No required additional search fees were timely paid by the applicant. Consequently, this international search report is restricted to the invention first mentioned in the claims; it is covered by claims Nos.: 1-71
Remark on Protest
The additional search fees were accompanied by the applicant’s protest and, where applicable, the payment of a protest fee.
The additional search fees were accompanied by the applicant’s protest but the applicable protest fee was not paid within the time limit specified in the invitation.
No protest accompanied the payment of additional search fees.
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.

Yarn energy harvesters containing conducing nanomaterials (such as carbon nanotube (CNT) yarn harvesters) that electrochemically convert tensile or torsional mechanical energy into electrical energy. Stretched coiled yarns can generate 250 W/kg of peak electrical power when cycled up to 24 Hz, and can generate up to 41.2 J/kg of electrical energy per mechanical cycle. Unlike for other harvesters, torsional rotation produces both tensile and torsional energy harvesting and no bias voltage is required, even when electrochemically operating in salt water. Since homochiral and heterochiral coiled harvester yarns provide oppositely directed potential changes when stretched, both contribute to output power in a dual-electrode yarn. These energy harvesters were used in the ocean to harvest wave energy, combined with thermally-driven artificial muscles to convert temperature fluctuations to electrical energy, sewn into textiles for use as self-powered respiration sensors, and used to power a light emitting diode and to charge a storage capacitor.


6. Drawings
a.
The figure of the drawings to be published with the abstract is Figure No.     4d    
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.
b.
none of the figures is to be published with the abstract.

A. CLASSIFICATION OF SUBJECT MATTER

     F03G 5/06 (2006.01)i; F03G 7/08 (2006.01)i; F03G 7/00 (2006.01)i; F03B 13/12 (2006.01)i
According to International Patent Classification (IPC) or to both national classification and IPC

B. FIELDS SEARCHED

Minimum documentation searched (classification system followed by classification symbols):
     F03G; F03B
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

C. DOCUMENTS CONSIDERED TO BE RELEVANT

Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
(1)
X
WO 2007103832 A2 (UNIV TEXAS [US]; BAUGHMAN RAY H [US]; EBRON VON HOWARD [US]; YANG ZHIW) 13 September 2007 (2007-09-13)
1-71
paragraphs [0021], [0087], [0091]; figures 13A,13B
(2)
A
WO 2016033514 A1 (MASSACHUSETTS INST TECHNOLOGY [US]) 03 March 2016 (2016-03-03)
1,30,31,47
abstract; figures 23A,23B,23C,23D,24
(3)
A
US 2016222536 A1 (SCHAUER MARK W [US] ET AL) 04 August 2016 (2016-08-04)
1,30,31,47
paragraphs [0074], [0108]; figure 1A
*
Special categories of cited documents:
"A"
document defining the general state of the art which is not considered to be of particular relevance
"E"
earlier application or patent but published on or after the international filing date
"L"
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)
"O"
document referring to an oral disclosure, use, exhibition or other means
"P"
document published prior to the international filing date but later than the priority date claimed
"T"
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
"X"
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
"Y"
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

D. INFORMATION ON PATENT FAMILY MEMBERS

Patent document cited in search report Publication date
(day/month/year)
Patent family member(s) Publication date
(day/month/year)
WO 2007103832 A2
13 September 2007
US 2009021106 A1
WO 2007103832 A2
22 January 2009
13 September 2007
WO 2016033514 A1
03 March 2016
US 2016064156 A1
US 2018090283 A1
WO 2016033514 A1
03 March 2016
29 March 2018
03 March 2016
US 2016222536 A1
04 August 2016
EP 3253709 A1
JP 2018506653 A
US 2016222536 A1
WO 2016126818 A1
13 December 2017
08 March 2018
04 August 2016
11 August 2016
Name and mailing address of the ISA/:
European Patent Office
P.B. 5818, Patentlaan 2, 2280 HV Rijswijk,
Netherlands
Telephone No. (+31-70)340-2040
Facsimile No. (+31-70)340-3016
Date of the actual completion of the international search:
26 February 2019
Date of mailing of the international search report:
30 April 2019
Authorized officer:
de Martino, Marcello
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