The USPTO receives more applications today than it ever has before. What happens to those applications? Patent … available, because the law prevented anyone from every finding out what happened to patent applications that did not ultimately …

. Using administrative data on successful and unsuccessful patent applications submitted to the US Patent and Trademark Office …

century. In addition to the funding agency, the data report whether the government has title to the patent ("title" patents …) or funded a patent assigned to a private organization ("license" patents). The data include a large number of "license …" patents that cannot be linked to government funding from patent text or other sources. Combining the historical data with …

first present descriptive results that chart the rise of brand-name patent portfolios and Paragraph IV challenges. Over time …, patenting has increased, measured by the number of patents per drug and the length of the nominal patent term. Meanwhile, the … fraction of drugs subjected to patent challenges has increased. Drugs are also challenged sooner, relative to brand …

Observers worry that generic patent challenges are on the rise and reduce the effective market life of drugs. A related …