Is it okay to use the patent for free? Do you have anything for free?

Is it okay to use the patent for free? Do you have anything for free? Perhaps many patentees don't understand, is the patent still free? Can everyone get a free patent? Yes, first of all, we need to know the current system of patents, what is patented technology, and what are the free patents for those cases. Because every country will make corresponding regulations on patent application protection, patents have a certain protection period, and after the patent protection period, free patents will be formed. Can patents be used for free? Patented technology refers to the technology protected by patent within the validity period. According to the classification of patents in China's patent law, it mainly includes technologies protected by invention patents and utility model patents. Because the design patent protects the new design, not the technology, it should be called the design patent, not the patented technology. But generally speaking, patent technology in a broad sense includes invention patent, utility model patent and design patent. When the patent application was successful, China stipulated that other countries in the world basically followed this rule; The protection period of invention patents in China is 20 years, and the protection period of utility model patents and appearance patents is 10 year. Therefore, when a patent expires, it becomes a patent document; Patent documents are documents that record information about inventions and creations. In a broad sense, it includes patent applications, patent specifications, patent bulletins, patent search tools and all patent-related information; Patent documents can also be divided into the above types according to their contents. Patent documents in a broad sense include patent applications, patent specifications, patent announcements, patent legal documents and patent retrieval tools. Once a patent becomes a patent document, it is an expired patent, and everyone in society can use it, which becomes a free patent situation; So we can call it free patent literature.