Biomedical metal materials are a class of biologically inert materials that are widely used in surgical implants and orthopedic devices in the field of orthopedics. At present, the commonly used medical metal materials are mainly cobalt-based alloys, stainless steels and titanium-based alloys.
From the perspective of patent volume, China's medical titanium alloy material patent technology covers a wide range of fields, among which chemical metallurgy (Part C), human life essentials (Part A), and operation and transportation (Part B) patent applications are the majority, especially for medical titanium alloys. The number of patents in the research of material composition (C22C) and medical use (A61L) is the highest.
IPC classification of patent applications for medical titanium alloy materials in China
1. IPC: C22C, patent quantity: 668, IPC note: alloy
2. IPC: C22F, patent number: 258, IPC note: change the physical structure of non-ferrous metals or non-ferrous alloys
3. IPC: A61L, number of patents: 242, IPC notes: general methods or devices for materials or disinfection; sterilization, disinfection or deodorization of air; chemical aspects of bandages, dressings, absorbent pads or surgical supplies; bandages, dressings , Absorbent pads or surgical materials
4. IPC: B22F, number of patents: 164, IPC notes: processing of metal powder; products made of metal powder; manufacturing of metal powder; special devices or equipment for metal powder
5. IPC: C23C, the number of patents: 60, IPC notes: plating of metal materials; plating of materials with metal materials; surface diffusion method, chemical conversion or replacement method of metal surface treatment; vacuum evaporation, General plating by sputtering method, ion implantation method or chemical vapor deposition method
6. IPC: B33Y, number of patents: 51, IPC note: additional manufacturing, through additional deposition, additional condensation or additional layering, such as 3D printing, three-dimensional photos or selective laser sintering 7. IPC: A61F, number of patents: 35 One, IPC note: filters and prostheses that can be implanted in blood vessels; devices that provide openings for human tubular structures or prevent them from collapsing
8. IPC: A61K, number of patents: 28, IPC notes: medical, dental or cosmetic preparations
9. IPC: A61B, number of patents: 26, IPC notes: diagnosis; surgery; identification
10. IPC: A61C, number of patents: 13, IPC notes: dentistry; oral or dental hygiene devices or methods At present, the research interest in the field of medical titanium alloys in my country continues to rise, and the number of patent applications continues to increase.
Data show that as of June 10, 2020, China's medical titanium alloy related patent applications reached 474. Moreover, judging from the number of patents in various provinces and cities, many provinces and cities in my country have attached great importance to the technical research and application of the medical titanium alloy industry. Among them, Liaoning Province is the region with the largest number of medical titanium alloy patent applications, with 87; followed by Beijing, Jiangsu, Shaanxi and Hunan, with 77, 58, 57, and 42 applications. From the perspective of patent validity, there are currently 117 patents for medical titanium alloy materials in China, 217 invalid patents, and 366 valid patents. It can reflect the high quality of patents in my country's medical titanium alloy material industry. Reasons for the invalidation of the patent 1. The State Intellectual Property Office declared the patent invalid 2. The patentee stopped paying the maintenance fee and automatically terminated the patent right 3. The patentee waived his rights in a written declaration