Nova Patents
ATE62498T1

Improved poly(aryl ether)s

Abstract

Poly(aryl ether)s which contain at least 20% by weight of bis-(3,5-dimethyl-4-oxyphenyl)sulfone structural units exhibit improved glass transition temperatures, improved flame resistance, improved gas permeability and improved alloying compatibility.

Term

Term ended

Projected expiry passed 18 April 2004, 22.4 years ago.

  1. Priority
  2. Filed
  3. Published
  4. Projected expiry
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17 members in 10 offices

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Priority claims
DocumentOfficeKindDate
48594883United States of AmericaA

Members17

Family members, oldest first
DocumentOfficeKind
US4473684AUnited States of AmericaA
WO8404101A1World Intellectual Property Organization (WIPO)A1
NO844785LNorwayL
DK605184ADenmarkA
DK605184D0DenmarkD0
FI844999LFinlandL
EP0146669A2European Patent Office (EPO)A2
JPS60501112AJapanA
CA1210891ACanadaA
FI73700BFinlandB
EP0146669A3European Patent Office (EPO)A3
FI73700CFinlandC
JPH0136849B2JapanB2
EP0146669B1European Patent Office (EPO)B1
AT62498TAustriaT
ATE62498T1This recordAustriaT1
DE3484426D1GermanyD1