WPI, File Supplier, No. AN-74-74916v, Derwent Publications Ltd., London, GB; & JP-A-79 023 395 (Mitsubishi Rayon Co., Ltd.) Aug. 13, 1979. |
Chemical Abstracts, vol. 82, 1975, p. 66, No. 9924h, Columbus, Ohio, US; & JP-A-74 22 952 (Mitsubishi Rayon Co., Ltd.) Jun. 12, 1974. |
Chemical Abstracts, vol. 81, 1974, p. 66, No. 121923j, Columbus, Ohio, US; & JP-A-74 51 371 (Mitsubishi Rayon Co., Ltd.) May 18, 1974. |
Chemical Abstracts, vol. 80, 1974, p. 34, No. 48866r, Columbus, Ohio, US; & JP-A-73 15 471 (Mitsubishi Raryon Co., Ltd.) May 15, 1973. |