In mid-November, South Korea-based solar manufacturer Hanwha Q-Cells had announced that the Chinese Patent Office’s examination and invalidity department (CNIPA) had rejected nullity proceedings against two of its patents, related to high-efficiency silicon solar cells, filed by Chinese PV panel maker Longi. At the time, the Korean company claimed victory in the proceedings and said it was seeing a good chance of being successful in proceedings before the European Patent Office.
In a statement issued today, Longi has taken a stand against Hanwha Q Cells’ claims. It explained that it filed its request to examine the validity of the Korean manufacturer’s two patents at the CNIPA between July and August and that in November the CNIPA declared the two patents partially invalid. According to the Chinese manufacturer, however, the invalidation procedure in the CNIPA is an administrative examination procedure that only examines whether or not the authorized Chinese patent complies with patent law requirements. “Such a procedure is not a lawsuit and does not incorporate any judgment or decision on whether a patent has been infringed,” Longi stated. “In addition, the preliminary opinion of the European Patent Office, published on October 21, 2020, stated that claims on the patent in dispute do not fulfill several legal validity requirements.”
Longi did not explain the consequences of this preliminary decision and emphasized that there was no patent infringement litigation or lawsuit for patent infringement between Longi and Hanwha Q-Cells in China, adding that the technologies applied in its existing and future products are quite different to those of the patent in dispute. “However, Longi will continue to file an invalidation procedure against the remaining claims on the above patents, in order to prevent the potential initiation of unnecessary patent infringement lawsuits by Hanwha Q-Cells,” the Chinese company stated.
Hanwha Q-Cells sued Longi as well as Jinkosolar and REC last year in Germany, the USA and Australia for possible infringement of its patents. This was rejected in the USA. In the first instance, however, the judges at the Düsseldorf Regional Court decided in favor of Hanwha Q-Cells. However, appeal procedures are now ongoing. The South Korean module manufacturer, with German roots, recently announced that it wanted to expand the patent lawsuits against its competitors to other countries – including France and Spain.
Hanwha Q-Cells sued three competitors in March 2019 – Jinkosolar, REC Solar and Longi Solar itself – for patent infringement in Germany at the Düsseldorf Regional Court, for the European equivalent of one of the two patents now confirmed by the Chinese Patent Office (‘971, equivalent European patent EP 2 220 689).
The judges ruled in favor of Hanwha Q-Cells in the first instance in Germany, in June. In October 2020, Hanwha Q-Cells moved to enforce the decision against Jinko Solar, which it claims has failed to comply.
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When you have multiple countries with indipendent patent offices and companies filing patents that are designed in each of the countries indipendently rather than an international patent authority that accepts or rejects patents, in real time, this is bound to happen. Who do you trust when some countries base the patent date on the application date and others on the approved date or even back date it to a date that the company or a cival authority tells the patent office to give it. China does not honor international authority like the decision or the disputed Islands and still claim them after 4 years they were ruled against. We will never get to a renewable energy global climate economy with patent disputes stopping production and putting companies out of business because the Big Boys will step on you and will use your courts against you while they won’t honor decisions they do not like by the same courts.