DWPI Polymer Indexing System Description

DWPI Polymer Indexing System Description

STN User Documentation

Since 1966, Polymer information has been indexed in Derwent World Patents Index from patents classified in Section A. The original Plasdoc Code, as it was then known, has undergone many changes since its introduction resulting in the Enhanced Polymer Indexing. The aim of the system, however, remains the same and that is to handle polymer information in the patent literature. More information on how to use this indexing system on STN can be found in “DWPI Enhanced Polymer Indexing Workshop“

Read more in the STN User Documentation