What are the criteria for judging the practicality of invention patents?

The criterion of practicality is relatively certain, but not arbitrary, and the examiner's discretion is small. In addition, as long as the possibility of the application of invention and creation is judged, the judgment of practicality is also used to search the comparative literature in the existing technology. However, certain standards should be followed when judging practicality. First of all, a practical invention should be able to be manufactured or used, that is, it should be implementable. To put an invention into practice, it must have a detailed and concrete plan. An invention with only one idea and no concrete embodiment is called an unfinished invention. Unfinished inventions are impractical, so they are not practical. If a scheme itself violates the laws of nature, then no matter how clever the invention is, it is definitely not practical. Because inventions that violate the laws of nature are impossible to implement. Therefore, only those inventions that have detailed and specific technical solutions and do not violate the laws of nature can be implemented. Another meaning of enforceability is to require an invention to be repeated. Although some schemes are detailed and specific, they cannot be implemented repeatedly in industry, and they are also not feasible. As long as you follow the plan put forward in the application, you can reproduce the claimed effect and repeat it at any time. Only such an invention can be realized. Second, practical inventions must be able to bring positive effects, that is, beneficial. Beneficial here means that an invention can play a positive role in social and economic development and the construction of material civilization and spiritual civilization. Usually, this positive effect can be manifested as improving product quality. Improve the working and production environment, save energy, reduce environmental pollution and reduce production costs. It should be noted here that income has different meanings from the technological progress mentioned in the previous section about creativity. Beneficiaries focus on the positive effects of inventions to meet social needs, while technological progress only refers to the progress of technical characteristics relative to existing technologies. Therefore, benefit and technological progress are two different concepts. However, there is a certain relationship between the two, and the obvious deterioration of the technical scheme is definitely not good. When judging the benefits, special attention should be paid. The positive effect brought by this invention may not have been produced at the time of patent application, as long as it is possible to produce positive effects. Therefore, we can't just look at some superficial phenomena for inventions. Some inventions that are not perfect in application or even have serious defects may have unparalleled vitality after overcoming the defects.