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:
Jan. 30, 2007
Filed:
Apr. 09, 2002
Anca Dumitrescu, Toulouse, FR;
Martin-vaca Blanca, Toulouse, FR;
Heinz Gornitzka, Pompertuzat, FR;
Didier Bourissou, Plaisance du Touch, FR;
Jean-bernard Cazaux, Aramon, FR;
Guy Bertrand, Riverside, CA (US);
Anca Dumitrescu, Toulouse, FR;
Martin-Vaca Blanca, Toulouse, FR;
Heinz Gornitzka, Pompertuzat, FR;
Didier Bourissou, Plaisance du Touch, FR;
Jean-Bernard Cazaux, Aramon, FR;
Guy Bertrand, Riverside, CA (US);
Abstract
The invention concerns the use of zinc derivatives of general formula (I) wherein: Lrepresents a group of formula: —E(R)(R')(R″), —E(R) (R′) or —E(R); E is an atom of group 15; Land Lindependently represent a group of formula: —E(R)(R′)(R″), —E(R)(R′) or —E(R), or together form a chain of formula —L′—A—L′—; A represents a saturated or unsaturated chain comprising one, two or three elements of group 14; L′and L′independently represent a group of formula —E(R)(R′) —E(R) or —E—; Eis an element of group 14; Eis an element of group 15; Eis an element of group 16; R, R′, R″, R, R′and Rrepresent various groups, as (co) polymerisation catalysts of cyclic esters