@article{48569,
      recid = {48569},
      author = {Porter, Alan L., and Markley, Mark, and Snead, Richard,  and Newman, Nils C.,},
      title = {Twenty years of US nanopatenting : Maintenance renewal  scoring as an indicator of patent value.},
      pages = {1 volume.},
      abstract = {This paper introduces a new measure of patent value –  Maintenance Renewal Score (MRSc) – reflecting assignee  valuing the patent by paying successive renewal fees. We  generate MRSc's for nanotechnology patents issued by the US  Patent Office from 1999 through 2009, with US assignees and  US inventors. Patenting increases over this period,  coincident with increased US funding of nanotechnology R&D.  We compare maintenance rates over the period, and against a  comparison set of all 1999 USPTO grants to US  inventors/assignees. We find differences in propensity to  maintain the nanopatents by institution type, technological  sector, and patent complexity.},
      url = {http://tind.wipo.int/record/48569},
      doi = {https://doi.org/10.1016/j.wpi.2023.102178},
}