| 摘要 |
<p>? ? No. 1079437 ? ISSUED 800610 ? CLASS 400-91 C.R. CL. ? INT. CL. 2 C08G 77/42 ? ? CANADIAN PATENT ? ? METHOD FOR PREPARING IMPROVED POLYALPHAMETHYLSTYRENE-POLYDIORGANOSILOXANE BLOCK COPOLYMERS ? Saam, John C.; Ward, Andrew H., U.S.A. Granted to Dow Corning Corporation, ? APPLICATION No. 281,435 ? FILED 770627 ? PRIORITY DATE U.S.A. (748,788) 761209 No. OF CLAIMS 5 - No drawing DISTRIBUTED BY THE PATENT OFFICE. OTTAWA. CCA-274 (5-79)</p> |
