EP0240301A3

Oxygen desorption for improved color of polyesters

Abstract

A process for forming poyesters with reduced yellow coloration wherein the polyester-forming monomers are dried in a vacuum before being reacted. The reaction system itself contains a substantially deoxygenated atmosphere. The removal of oxygen from the reactants and the reaction system leads to the lessening of yellow coloration of the polyester product.

Term

Term ended

Projected expiry passed 31 March 2007, 19.5 years ago.

6 members in 4 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
846676	United States of America	–	1986-04-01
84667686	United States of America	A	1986-04-01
846676	–	–	–
US19860846676	–	–	–

Members6

Family members, oldest first
Document	Office	Kind
US4661580A	United States of America	A	1987-04-28
EP0240301A2	European Patent Office (EPO)	A2	1987-10-07
JPS62241919A	Japan	A	1987-10-22
EP0240301A3This record	European Patent Office (EPO)	A3	1989-08-30
CA1269479A	Canada	A	1990-05-22
JPH0629317B2	Japan	B2	1994-04-20

9 legal events, as the office reported them to INPADOC

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Events

Legal events, newest first
	Event	Code
2007-08-08	Information on inventor provided before grant (corrected)RIN1	RIN1
1991-04-10	Application withdrawn (corrected)WithdrawnR18W	R18W
1991-04-03	Application withdrawnWithdrawn18W	18W
1991-02-22	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION HAS BEEN WITHDRAWNSTAA	STAA
1990-03-21	Request for examination filed17P	17P
1989-08-30	Designated contracting statesAK	AK
1989-07-13	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL
1987-10-07	Designated contracting statesAK	AK
1987-08-22	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI