Introduction to Expired Patent > Introduction to Expired Patent Search
The necessity for strategies to efficiently use expired patents is increasing.
Through the service, you are able to easily search and download information on the patents that have expired due to the non-payment of maintenance fees on registered patents, expiration of patent rights term, or filing of patent invalidation lawsuit, among the patents registered in Korea and the U.S.
<Note> The K-PEG system only evaluates patents of which the issuance rights are currently maintained, and does not evaluate expired patents.
The service is to monitor and provide information on patents of which the patent rights have become invalid due to the expiration of patent rights term, non-payment of maintenance fees on registered patents, or filing of patent invalidation lawsuit, in the process of weekly update. However, there may be difference in the information, depending on the date of database application and the procurement of data regarding administrative measures from Patent Office in each country. Therefore, for more accurate information, we recommend you further search on the website of a designated country’s Patent Office.
The patent rights of inventions, which were used for a high royalty rate in the past, can be used for free if the patent rights term has expired.
However, for improvement inventions, the patent art can be implemented without constraint only when the patent of a third patentee is not invaded.
Through the service, we collect and analyze information on the expired patents in depth and systematically in advance, and provide the information to the related industry, thereby increasing the efficiency of R&D of the industry and preventing the unnecessary patent disputes over the improvement patent in advance.