巍华新材：第四代制冷剂专利保护期并非统一，因具体品类、技术及企业不同存在差异

Core Viewpoint - Wihua New Materials (603310) indicated that the patent protection period for the fourth-generation refrigerants is not uniform, as it varies by specific category, technology, and company [1] Group 1 - Some related patents are indeed expiring this year, but there is no unified standard for the specific expiration dates, and different patents have different expiration timelines [1]