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1. (WO2019030607) LIGHTGUIDE HAVING OPENING AND SURROUNDING CHANNEL



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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/IB2018/055673 79734WO003
International filing date (day/month/year) (Earliest) Priority Date (day/month/year)
30 July 2018 08 August 2017
Applicant
3M INNOVATIVE PROPERTIES COMPANY
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: 1-3
An optical system, comprising:a lightguide comprising:opposing top and bottom major surfaces;a round through opening extending from the top major surface to the bottom major surface;an elongated first channel formed in one of the top and bottom major surfaces and at least partially surrounding and substantially concentric with the opening, the first channel having a depth (d) that varies along a length of the first channel; anda plurality of light extractors for extracting light that would otherwise propagate within and along the lightguide.
2. claims: 4-10
A lightguide comprising substantially coextensive spaced apart first and second elongated channels, each elongated channel extending from a first end of the elongated channel proximate a same first edge of the lightguide to an opposing second end of the elongated channel proximate a same second edge of the lightguide, wherein at least one of the first and second elongated channels has a maximum depth (hi, h2) that is at least 0.5 times a thickness of the lightguide.
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.: 1-3
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.
6. Drawings
a.
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.
b.
none of the figures is to be published with the abstract.

A. CLASSIFICATION OF SUBJECT MATTER

     F21V 8/00 (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):
     G02B
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

C. DOCUMENTS CONSIDERED TO BE RELEVANT

Category* Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No.
(1)
A
US 2008290784 A1 (ARBAB MEHRAN [US] ET AL) 27 November 2008 (2008-11-27)
1-3
paragraphs [0024], [0027], [0034], [0038], [0039]; figure 3
(2)
A
JP 2004196585 A (NIPPON SHEET GLASS CO LTD; OKAMOTO GLASS CO LTD; CENTRAL GLASS CO LTD;) 15 July 2004 (2004-07-15)
1-3
figure 2
(3)
A
EP 1045262 A1 (JAPAN SCIENCE & TECH CORP [JP]; MIURA KIYOTAKA [JP]) 18 October 2000 (2000-10-18)
1-3
figure 4
(4)
A
US 2016377796 A1 (SHERMAN AUDREY A [US] ET AL) 29 December 2016 (2016-12-29)
1-3
figures 2-6b
(5)
A
US 2009284836 A1 (BOYD GARY T [US] ET AL) 19 November 2009 (2009-11-19)
1-3
figures 2-3
*
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)
US 2008290784 A1
27 November 2008
US 2008290784 A1
WO 2009155183 A1
27 November 2008
23 December 2009
JP 2004196585 A
15 July 2004
NONE
EP 1045262 A1
18 October 2000
AU 714199 B2
CA 2200155 A1
DE 69704065 D1
DE 69704065 T2
EP 0797112 A1
EP 1045262 A1
JP 3649835 B2
JP H09311237 A
KR 100300822 B1
US 5978538 A
23 December 1999
18 September 1997
22 March 2001
19 July 2001
24 September 1997
18 October 2000
18 May 2005
02 December 1997
03 September 2001
02 November 1999
US 2016377796 A1
29 December 2016
US 2016377796 A1
WO 2015142864 A1
29 December 2016
24 September 2015
US 2009284836 A1
19 November 2009
CN 102027394 A
EP 2286286 A1
JP 5748655 B2
JP 2011525994 A
KR 20110007618 A
US 2009284836 A1
WO 2009140392 A1
20 April 2011
23 February 2011
15 July 2015
29 September 2011
24 January 2011
19 November 2009
19 November 2009
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:
16 October 2018
Date of mailing of the international search report:
21 December 2018
Authorized officer:
Verdrager, Véronique
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