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Extract from the Register of European Patents

EP About this file: EP3813239

EP3813239 - SELF-FEEDING CIRCUIT AND POWER CONVERSION DEVICE [Right-click to bookmark this link]
StatusNo opposition filed within time limit
Status updated on  21.02.2025
Database last updated on 28.03.2026
FormerThe patent has been granted
Status updated on  15.03.2024
FormerGrant of patent is intended
Status updated on  20.11.2023
FormerExamination is in progress
Status updated on  08.07.2022
FormerRequest for examination was made
Status updated on  26.03.2021
FormerThe international publication has been made
Status updated on  03.01.2020
Most recent event   Tooltip13.03.2026Lapse of the patent in a contracting state
New state(s): HU		published on 15.04.2026 [2026/16]
Applicant(s)For all designated states
Mitsubishi Electric Corporation
7-3, Marunouchi 2-chome
Chiyoda-ku
Tokyo 100-8310 / JP
For all designated states
TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
3-1-1 Kyobashi
Chuo-ku
Tokyo 104-0031 / JP
[2021/17]
Inventor(s)01 / ISHII, Yuki
c/o MITSUBISHI ELECTRIC CORPORATION, 7-3,
Marunouchi 2-chome, Chiyoda-ku
Tokyo 100-8310 / JP
02 / NAKAYAMA, Akito
c/o MITSUBISHI ELECTRIC CORPORATION, 7-3,
Marunouchi 2-chome, Chiyoda-ku
Tokyo 100-8310 / JP
03 / ISOZAKI, Jumpei
c/o TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL
SYSTEMS CORPORATION, 3-1-1 Kyobashi, Chuo-ku
Tokyo 104-0031 / JP
04 / TSUCHIYA, Taichiro
c/o TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL
SYSTEMS CORPORATION, 3-1-1 Kyobashi, Chuo-ku
Tokyo 104-0031 / JP
 [2021/17]
Representative(s)Meissner Bolte Partnerschaft mbB
Patentanwälte Rechtsanwälte
Postfach 86 06 24
81633 München / DE
[2024/16]
Former [2021/17]Trinks, Ole
Meissner Bolte Patentanwälte
Rechtsanwälte Partnerschaft mbB
Widenmayerstraße 47
80538 München / DE
Application number, filing date18924674.725.06.2018
[2021/17]
WO2018JP23993
Filing languageJA
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO2020003348
Date:02.01.2020
Language:JA
[2020/01]
Type: A1 Application with search report 
No.:EP3813239
Date:28.04.2021
Language:EN
[2021/17]
Type: B1 Patent specification 
No.:EP3813239
Date:17.04.2024
Language:EN
[2024/16]
Search report(s)International search report - published on:JP02.01.2020
(Supplementary) European search report - dispatched on:EP21.05.2021
ClassificationIPC:H02M1/092, H02M1/32, H02M1/00, H02M1/096, H02M3/335, H02M7/483
[2023/47]
CPC:
H02M3/33523 (EP,US); H02M1/0006 (EP,US); H02M1/0074 (US);
H02M1/092 (EP); H02M1/096 (EP); H02M1/32 (US);
H02M1/325 (EP,US); H02M7/4835 (EP); H02M7/48 (US) (-)
Former IPC [2021/25]H02M1/08, H02M3/28, H02M1/00, H02M1/32, H02M3/07, H02M3/335, H02M7/483
Former IPC [2021/17]H02M1/08, H02M3/28
Designated contracting statesAL,   AT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MK,   MT,   NL,   NO,   PL,   PT,   RO,   RS,   SE,   SI,   SK,   SM,   TR [2021/17]
Extension statesBANot yet paid
MENot yet paid
Validation statesKHNot yet paid
MANot yet paid
MDNot yet paid
TNNot yet paid
TitleGerman:SELBSTSPEISENDE SCHALTUNG UND LEISTUNGSUMWANDLUNGSVORRICHTUNG[2021/17]
English:SELF-FEEDING CIRCUIT AND POWER CONVERSION DEVICE[2021/17]
French:CIRCUIT À ALIMENTATION AUTONOME ET DISPOSITIF DE CONVERSION DE COURANT[2021/17]
Entry into regional phase17.12.2020Translation filed 
17.12.2020National basic fee paid 
17.12.2020Search fee paid 
17.12.2020Designation fee(s) paid 
17.12.2020Examination fee paid 
Examination procedure17.12.2020Examination requested  [2021/17]
17.12.2021Amendment by applicant (claims and/or description)
12.07.2022Despatch of a communication from the examining division (Time limit: M04)
21.11.2022Reply to a communication from the examining division
21.11.2023Communication of intention to grant the patent
07.03.2024Fee for grant paid
07.03.2024Fee for publishing/printing paid
07.03.2024Receipt of the translation of the claim(s)
Opposition(s)20.01.2025No opposition filed within time limit [2025/13]
Fees paidRenewal fee
05.01.2021Renewal fee patent year 03
14.06.2021Renewal fee patent year 04
13.05.2022Renewal fee patent year 05
12.05.2023Renewal fee patent year 06
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Patent Court		 See the Register of the Unified Patent Court for opt-out data
Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Lapses during opposition  TooltipCY25.06.2018
HU25.06.2018
AT17.04.2024
BG17.04.2024
CZ17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
IT17.04.2024
LV17.04.2024
MC17.04.2024
NL17.04.2024
PL17.04.2024
RO17.04.2024
SI17.04.2024
SK17.04.2024
SM17.04.2024
IE25.06.2024
LU25.06.2024
BE30.06.2024
CH30.06.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
[2026/16]
Former [2025/51]CY25.06.2018
AT17.04.2024
BG17.04.2024
CZ17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
IT17.04.2024
LV17.04.2024
MC17.04.2024
NL17.04.2024
PL17.04.2024
RO17.04.2024
SI17.04.2024
SK17.04.2024
SM17.04.2024
IE25.06.2024
LU25.06.2024
BE30.06.2024
CH30.06.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2025/22]AT17.04.2024
BG17.04.2024
CZ17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
IT17.04.2024
LV17.04.2024
MC17.04.2024
NL17.04.2024
PL17.04.2024
RO17.04.2024
SI17.04.2024
SK17.04.2024
SM17.04.2024
IE25.06.2024
LU25.06.2024
BE30.06.2024
CH30.06.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2025/13]AT17.04.2024
BG17.04.2024
CZ17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
IT17.04.2024
LV17.04.2024
MC17.04.2024
NL17.04.2024
PL17.04.2024
RO17.04.2024
SK17.04.2024
SM17.04.2024
LU25.06.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2025/11]AT17.04.2024
BG17.04.2024
CZ17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
IT17.04.2024
LV17.04.2024
MC17.04.2024
NL17.04.2024
PL17.04.2024
RO17.04.2024
SK17.04.2024
SM17.04.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2025/10]AT17.04.2024
BG17.04.2024
CZ17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
LV17.04.2024
NL17.04.2024
PL17.04.2024
RO17.04.2024
SK17.04.2024
SM17.04.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2025/09]AT17.04.2024
BG17.04.2024
DK17.04.2024
EE17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
LV17.04.2024
NL17.04.2024
PL17.04.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2025/08]AT17.04.2024
BG17.04.2024
DK17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
LV17.04.2024
NL17.04.2024
PL17.04.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2024/49]AT17.04.2024
BG17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
LV17.04.2024
NL17.04.2024
PL17.04.2024
NO17.07.2024
RS17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2024/48]AT17.04.2024
BG17.04.2024
ES17.04.2024
FI17.04.2024
HR17.04.2024
NL17.04.2024
NO17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2024/47]BG17.04.2024
FI17.04.2024
HR17.04.2024
NL17.04.2024
NO17.07.2024
GR18.07.2024
IS17.08.2024
PT19.08.2024
Former [2024/46]BG17.04.2024
FI17.04.2024
HR17.04.2024
NL17.04.2024
NO17.07.2024
IS17.08.2024
Former [2024/44]NL17.04.2024
Documents cited:Search[Y] CN105991006  (STATE GRID CORP CHINA et al.) [Y] 1-11 * abstract *
 [Y] EP2866354  (VITO NV VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV et al.) [Y] 1-11 * figures 3,5 * * paragraphs [0030] - [0038] * * paragraph [0053] *
 [Y] US2013214601  (YANG TA-YUNG et al.) [Y] 1-11 * abstract *
 [Y]   R. GIRI ET AL: "Common-duty-ratio control of input-series connected modular DC-DC converters with active input voltage and load-current sharing", IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS., vol. 42, no. 4, 1 July 2006 (2006-07-01), US, pages 1101 - 1111, XP055610033, ISSN: 0093-9994, DOI: 10.1109/TIA.2006.876064 [Y] 1-11 * page 1109; figure 17 * * first par. of Section III *

DOI:   http://dx.doi.org/10.1109/TIA.2006.876064
 [A]   GRBOVIC P J: "Master/Slave Control of Input-Series- and Output-Parallel-Connected Converters: Concept for Low-Cost High-Voltage Auxiliary Power Supplies", IEEE TRANSACTIONS ON POWER ELECTRONICS, INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, USA, vol. 24, no. 2, 1 February 2009 (2009-02-01), pages 316 - 328, XP011351274, ISSN: 0885-8993, DOI: 10.1109/TPEL.2008.2006975 [A] 1-11 * pages 1-4 * * first four paragraphs of Section VII on page 326 *

DOI:   http://dx.doi.org/10.1109/TPEL.2008.2006975
International search[XYA] WO2015005312  (TOSHIBA KK et al.) [X] 1, 11 * , [0006], *[0008]-[0011], [0016], [0019], [0025], 1-2 & EP 3021472 A1, [0006] - [0007], [0009]-[0012] [0017], [0020]-[0021], [0027], 0 1-2 & US 2016/0141965 A1 & CN 105432006 A *[Y] 4-6 [A] 2-3, 7-10
 [Y] JP2018078751  (DAIHEN CORP et al.) [Y] 4-6 * , [0023] -[0026], 1-2 *
 [A] JP2000209872  (HONDA MOTOR CO LTD et al.) [A] 2-3, 8 * , [0015] -[0016], [0025], [0036] - [0037], 1-3 & US 6281664 B1, 6 12-22 8 35-49 *
 [A] JP2013118743  (FUJI ELECTRIC CO LTD et al.) [A] 2-3, 8 * , [0033] - [0034], 3 & US 2013/0141952 A1, [0054] - [0056], 3 & DE 102012222065 A1 & CN 103138621 A *
 [A] JPH0568301  (TOSHIBA TRANSPORT ENG et al.) [A] 7, 9-10 * , [0021], *
 [A] JP2016077135  (MITSUBISHI ELECTRIC CORP et al.) [A] 7, 9-10 * , [0009], 9 & EP 3002864 A1, [0009], 9 *
by applicantJP2011193615
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.