Fred: How long is the duration of patent right for an invention according to your patent Law?
佛瑞德：根据专利法，专利权的期限应是多长时间呢？
Fred: : How long is the duration of patent right for an invention according to your patent Law?
佛瑞德：根据专利法，专利权的期限应是多长时间呢？ ？
Article 44. In any of the following cases, the patent right shall cease before the expiration of its duration.
第四十四条有下列情形之一的，专利权在期限届满前终止。
If the valid duration of the patent right expires or the patent right is declared invalid, the patentee may not conclude a patent exploitation license contract relating to that patent with others.
专利权有效期限届满或者专利权被宣布无效的，专利权人不得就该专利与他人订立专利实施许可合同。
This paper analyses the revenue curve of patent duration and the model of maintaining patent, and then for the first time, explains the difference of patent costs between at home and abroad.
文章通过分析专利的期限收益曲线、专利维持模型，首次提出国内企业和国外企业的专利成本的不同，并对此现象进行了解释。
The expansion of patent embodies in the extension of the validity of patent right in respect of duration and scope.
专利权的扩张体现于专利权效力在时间和范围上的延展。
The validity term of a patent or trademark license is agreed to by the parties, but cannot exceed the remaining duration of protection of the patent or trademark license.
一个专利或商标使用许可有效期由双方商定，但不能超过专利或商标使用许可保护剩余的时间。
The duration of aFrench patent is 20 years calculating from the filing date subject to the payment of annuities.
专利有效期为20年，自申请日起算。 当然，如果中间没有持续缴纳年费的话将会使专利失效。
The duration of aFrench patent is 20 years calculating from the filing date subject to the payment of annuities.
专利有效期为20年，自申请日起算。 当然，如果中间没有持续缴纳年费的话将会使专利失效。
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