Invalid patent is an extremely important information resource. This paper discusses the causes of invalid patents and the value and ways of development and utilization from the aspects of 10. There is a common misunderstanding that invalid patents have no use value since they have expired.
Therefore, it was "shelved" and left to its own devices, resulting in a serious waste of resources. Therefore, it is necessary to improve the understanding of invalid patent as an important information resource, find out its formation reasons and application value, and clarify the ways and methods of its development and utilization.
Development and utilization:
1. Obtain invalid patent through CD.
China invalid patent CD database published by Patent Literature Publishing House stores about 250,000 invalid patent information. It is an important library for retrieving invalid patent information of related disciplines since China Intellectual Property Office 1 April 19851. It has the advantages of many search channels, strong functions and high speed. The search results also show the reason and date of patent invalidation.
2. Obtaining invalid patents through the Internet.
Looking up China National Intellectual Property Administration through the computer network, entering the website and clicking on the China patent literature database will lead to invalid patent literature for people to choose to use.
3. Obtain invalid patents from conventional channels.
Obtaining invalid patents by printing patent documents such as China patent index, patent bulletin and patent specification. Among them, the first two are retrieval tools, and the latter patent specification is a document, reflecting the full text of invalid patents.