PDF, Patent Landscape Report on Atazanavir - WIPO

SECTION 4: PREPARING THE CHEMICAL COLLECTIONMULTI-FACETED APPROACHA number of approaches are useful to prepare a collection of pre-clinical patents coveringthe same or similar compounds, even though the Atazanavir name was not yet available.These approaches are applicable even when access to enhanced content such as theDerwent World <strong>Patent</strong> Index is not available, and all have been used in this report.List of search approaches:1. Identifying founder compositions by using the SPC filing registration found in the LegalStatus field. In later documents this field is also likely to contain the generic or brandname of the drug.2. Searching for key terms selected from the unique parts of the chemical name (±classification codes)3. Searching for CAS codes in the description field4. Searching for founding inventor names together with their developer company names toselect potentially related documents from the company’s holdings.5. Searching target key terms together with developer company names.6. Searching for documents that cite patents owned by the companies involved indevelopment.The results from such searches do overlap with one another, and may also overlap with theclinical collection. After cross-deduplication, they will often need further review to determineif they are sufficiently on-topic. It is expected that this list will contain many fewerdocuments than are present in the clinical collection, because the volume of patents istypically lower before the discovery phase moves into clinical development. However, thesedocuments should help fill in the “gap” period mentioned earlier, the period between the firstcomposition patent, and the beginnings of clinical testing. The details for these searchstrategies are provided in Appendix A.16