The patent EP3115613 was granted to Hangzhou Sanhua Research Institute on Jul 30, 2025. The application was originally filed on Jun 29, 2016 under application number EP16176902A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| EXAMINATION | CN201843822U |
| EXAMINATION | JPH09310697 |
| EXAMINATION | US2013164136 |
| OPPOSITION | CN101865157 |
| OPPOSITION | CN201843822U |
| OPPOSITION | CN202170891U |
| OPPOSITION | CN203570667U |
| OPPOSITION | EP0623752 |
| OPPOSITION | EP2402112 |
| OPPOSITION | JP2010065528 |
| OPPOSITION | JPH09310697 |
| OPPOSITION | US2006140767 |
| OPPOSITION | WO2013124314 |
| SEARCH | JP2010065528 |
| SEARCH | JP2961686B |
NPL citations refer to non-patent references such as research papers, articles, or other publications cited during examination or opposition phases.
| Citation Phase | Reference Text |
|---|---|
| OPPOSITION | - Cavazzini Giovanna, Et Al., "Using splitter blades to improve suction performance of centrifugal impeller pumps", Proceedings of the Institution of Mechanical Engineers, (20150101), vol. 229, no. 3, XP055978706 |
| OPPOSITION | - Hartmann Melvin J, "Design and Experimental Performance of a Small Centrifugal Pump for Liquid Hydrogen", National Aeronautics and Space Administration, (19600101), XP055978708 |
| OPPOSITION | - Miller Max Joseph, Et Al., "Detailed Performance of a Radial-Bladed Centrifugal Pump Impeller in Wate", National Aeronautics and Space Administration, (19690101), XP055978707 |
Get a free citation report including examiner, opposition, and international search citations.
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Decision to grant a European patent
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Dec 15, 2021
(Electronic) Receipt
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Dec 15, 2021
Filing of the translations of the claims
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Dec 15, 2021
French translation of claims
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German translation of the claims
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Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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(Electronic) Receipt
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Oct 22, 2020
Amended claims with annotations
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Claims
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Oct 22, 2020
Letter accompanying subsequently filed items
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Communication from the Examining Division
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Jul 17, 2018
(Electronic) Receipt
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Jul 17, 2018
Letter accompanying subsequently filed items
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Annex to the communication
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Communication from the Examining Division
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(Electronic) Receipt
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Amended claims with annotations
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Amended description with annotations
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Amendments received before examination
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Jul 10, 2017
Letter accompanying subsequently filed items
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Jul 10, 2017
Written request for examination
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Annexes in respect of a client data request
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May 3, 2017
Payment of fees and costs
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Notification of forthcoming publication
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European search opinion
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European search report
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Dec 6, 2016
Information on Search Strategy
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Nov 24, 2016
Search started
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Sep 16, 2016
Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Communication to designated inventor
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Jul 26, 2016
Letter concerning fees and payments
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Jul 26, 2016
Payment of fees and costs
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Jun 29, 2016
Abstract
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Jun 29, 2016
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Claims
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Jun 29, 2016
Description
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Jun 29, 2016
Request for grant of a European patent
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