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Process for preparing isomeric trisaryloxycyclotriphosphazene polymer precursors and intermediates

EP 0380616 A1 · Applicant: THE GOVERNMENT OF THE UNITED STATES OF AMERICA as represented by THE ADMINISTRATOR OF THE NATIONAL AERONAUTICS AND

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed June 20, 1989 and never granted as a European patent. Had it been granted, its 20-year term would have ended June 20, 2009.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by December 20, 2014.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJune 20, 1989
PublishedAugust 8, 1990
GrantedNever granted
Term endedJune 20, 2009
Application numberEP 89907955
Classification (CPC)C07F9/65815

Timeline

Timeline From EPO dates

1990199219941996199820002002200420062008Application filedJune 20, 1989PublishedAug 8, 1990Term endedJune 20, 2009

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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