Post-grant validity challenges at patent offices rely on the private initiative of third parties to correct mistakes … made by patent offices. We hypothesize that incentives to bring post-grant validity challenges are reduced when many firms … benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents …

Post-grant validity challenges at patent offices rely on the private initiative of third parties to correct mistakes … made by patent offices. We hypothesize that incentives to bring post-grant validity challenges are reduced when many firms … benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents …

Post-grant validity challenges at patent offices rely on the private initiative of third parties to correct mistakes … made by patent offices. We hypothesize that incentives to bring post-grant validity challenges are reduced when many firms … benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents …

Post-grant validity challenges at patent offices rely on the private initiative of third parties to correct mistakes … made by patent offices. We hypothesize that incentives to bring post-grant validity challenges are reduced when many firms … benefit from revocation of a patent and when firms are caught up in patent thickets. Using data on opposition against patents …

We report the results of the first comparative study of the determinants and effects of patent oppositions in Europe … patent in about 41 percent of the cases, and to a restriction of the patent right in another 30 percent of the cases. Re …-examination results in a cancellation of the patent right in only 12.2 percent of all cases. We also find that reexamination is frequently …

The recent surge in U.S. patenting and expansion of patentable subject matter has increased patent office backlogs and …. At the same time patent litigation and its costs are rising. This paper explores the potential of a post-grant review … process modeled on the European opposition system to improve patent quality, reveal overlooked prior art, and reduce …

The recent surge in U.S. patenting and expansion of patentable subject matter has increased patent office backlogs and …. At the same time patent litigation and its costs are rising. This paper explores the potential of a post-grant review … process modeled on the European opposition system to improve patent quality, reveal overlooked prior art, and reduce …