When will the patent transfer agreement come into effect?

The patent transfer agreement generally takes effect when the contract is established, but the act of transferring the patent needs to be registered before it takes effect. Legal basis: If the third paragraph of Article 10 of the Patent Law of People's Republic of China (PRC) assigns the right to apply for a patent or the patent right, the parties concerned shall conclude a written contract and register it with the patent administration department of the State Council, and the patent administration department of the State Council shall make an announcement. The transfer of the right to apply for a patent or the patent right shall take effect from the date of registration. Article 502 of the Civil Code of People's Republic of China (PRC) * * * A contract established in accordance with the law shall take effect upon its establishment, except as otherwise provided by law or agreed by the parties. In accordance with the provisions of laws and administrative regulations, if the contract should go through the approval procedures, such provisions shall prevail. If the failure to go through the formalities such as approval affects the effectiveness of the contract, it will not affect the performance of the obligation clauses such as approval and the effectiveness of relevant clauses in the contract. If the party that should go through the formalities for approval fails to perform its obligations, the other party may require it to bear the responsibility for violating its obligations. The modification, assignment and dissolution of a contract shall be subject to the provisions of laws and administrative regulations, and the provisions of the preceding paragraph shall apply and shall be subject to approval.