Cited in | International search | Type: | Patent literature | Publication No.: | GB1142538
[A] (SHELL INT RESEARCH) [A] 1* claims 1,2 *; | Type: | Patent literature | Publication No.: | EP0117086
[A] (CELANESE CORP [US]) [A] 1 * claims 1,2 *; | Type: | Patent literature | Publication No.: | JPH032948
[ ] (CITIZEN WATCH CO LTD) | Type: | Non-patent literature | Publication information: | [A] - KIYOSHI CHUJO ET AL., "Catalyst for lactide polymerization", CHEMICAL ABSTRACTS, (19680610), vol. 68, no. 24, Database accession no. 105648z, page 10213 [A] 1 * abstract * |