The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 1991
Filed:
Jul. 03, 1990
Daisuke Fukuoka, Yamaguchi, JP;
Takeshi Ishitoku, Yamaguchi, JP;
Katsuya Takahashi, Yamaguchi, JP;
Takashi Tashiro, Yamaguchi, JP;
Junichi Imuta, Yamaguchi, JP;
Hiroaki Tan, Yamaguchi, JP;
Masaharu Ishiguro, Yamaguchi, JP;
Noriaki Kihara, Yamaguchi, JP;
Teruaki Mukaiyama, Yamaguchi, JP;
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Abstract
Process for preparing polyalkyl-2-alkoxy-7-hydroxychroman derivative of the general formula (V): ##STR1## wherein R.sup.1 denotes lower primary alkyl, R.sup.2 denotes hydrogen or lower primary alkyl and R.sup.3 denotes loweralkyl, by reacting resorcin with either an aliphatic ketone of the general formula (I): ##STR2## wherein R.sup.1 and R.sup.2 are as defined above, and an alcohol of the formula (II):