Computer storage and retrieval of generic chemical structures in patents. 10. Assignment and logical bubble-up of ring screens for structurally explicit generics

The rings perceived within and across the partial structures of structurally explicit generics are analyzed to produce ring-screen information that complements the existing fragment screens. This paper presents and discusses the format of these ring screens. The resultant bit vectors for each partial structure are accumulated to retain their logical relationships by means of a «bubble-up» of the vectors. The principles of the bubble-up are outlined and explained by means of several examples