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Research Article

Polymorphs and Prodrugs and Salts (Oh My!): An Empirical Analysis of “Secondary” Pharmaceutical Patents

  • Amy Kapczynski equal contributor,

    equal contributor Contributed equally to this work with: Amy Kapczynski, Chan Park, Bhaven Sampat

    Affiliation: Yale Law School, Yale University, New Haven, Connecticut, United States of America

    X
  • Chan Park equal contributor,

    equal contributor Contributed equally to this work with: Amy Kapczynski, Chan Park, Bhaven Sampat

    Affiliation: Medicines Patent Pool, Geneva, Switzerland

    X
  • Bhaven Sampat equal contributor mail

    equal contributor Contributed equally to this work with: Amy Kapczynski, Chan Park, Bhaven Sampat

    bns3@columbia.edu

    Affiliation: Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York, New York, United States of America

    X
  • Published: December 05, 2012
  • DOI: 10.1371/journal.pone.0049470

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