The assessment of patent value plays an important role in measuring innovation outputs and understanding innovative activities. With an aim of the relationship exploration among bio-tech patent renewal, patent value, and influencing factors, a database of genetic engineering patents, which includes characteristics of patent and the owner(s), and the patent renewal data collected from USPTO are retrieved. Based on a logistic regression model and SAS 9.1.3 calculation, the factors which affect the renewal of genetic engineering patent are found and then used to discuss the specific phenomena of bio-tech innovative activities. Through analyzing 1,063 US genetic engineering patents granted during the period of 1991-1996, it is found that genetic engineering patents have high renewal rate, and 61% patents which are mostly owned by large entities are renewed to full time and the average age is 13.65 years. The result of logistic regression shows that the renewal of genetic engineering patents is effectively influenced by the assignee number, the scale of entity, forward citation, and internal sequential innovation. This fact has insightful implication for technology policy-making and innovation strategy management.
Key words
patent renewal /
genetic engineering patent /
cooperative innovation /
internal sequential innovation
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