What are the conditions that constitute patent infringement?

1, the object of infringement should be a valid patent with a patent right in China; 2. There are illegal acts. That is, the actor infringes the patent for profit without the permission of the patentee; 3. The infringement has caused damage consequences; 4. The actor is subjectively at fault. Legal basis: Article 185 of the Civil Law of People's Republic of China (PRC) intentionally infringes on the intellectual property rights of others, and if the circumstances are serious, the infringed person has the right to request corresponding punitive damages. Article 184 of the Civil Code of People's Republic of China (PRC) infringes upon another person's property, and the property loss shall be calculated according to the market price at the time of loss or other reasonable means.