Document Type : Original Article
Authors
1 Payame Noor University
2 yazd University
Abstract
Purpose: This research tries to determinants of patent citations by using a survival analysis.
Methods: Research method was patent citation analysis. Research population consisted of 25,392 patents in the USPTO database in the Data Processing: Artificial Intelligence (AI) (Category: 706). Cox and Kaplan-Meier regression were used to analyze the data.
Finding: The research findings showed that of the 6749 patents that received first citation, in the first three months, the probability of citing each patent was less than one percent, and the probability of being cited increased over time. So that probability has risen to over 90% after 84 months. Kaplan-Meier test results showed that it takes between 38 and 40 months on average to a patent obtain first citation in the field of AI.
Results: The results of the Cox test showed that, at the significant level of 0.05, inventors and assignees were influenced the productivity and receiving citation of patents.
Purpose: This research tries to determinants of patent citations by using a survival analysis.
Methods: Research method was patent citation analysis. Research population consisted of 25,392 patents in the USPTO database in the Data Processing: Artificial Intelligence (AI) (Category: 706). Cox and Kaplan-Meier regression were used to analyze the data.
Finding: The research findings showed that of the 6749 patents that received first citation, in the first three months, the probability of citing each patent was less than one percent, and the probability of being cited increased over time. So that probability has risen to over 90% after 84 months. Kaplan-Meier test results showed that it takes between 38 and 40 months on average to a patent obtain first citation in the field of AI.
Results: The results of the Cox test showed that, at the significant level of 0.05, inventors and assignees were influenced the productivity and receiving citation of patents.
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