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Expired European patentEurope

Synthesis of morpholine and derivatives thereof via the reaction of dialkylene glycol and ammonia

EP 0036331 B1 · Applicant: AIR PRODUCTS AND CHEMICALS, INC.

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Overview

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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 March 17, 1981 and granted August 1, 1984. A European patent lasts at most 20 years from filing, so its term ended March 17, 2001.
  • 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 September 17, 2006.
  • 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.
FiledMarch 17, 1981
PublishedSeptember 23, 1981
GrantedAugust 1, 1984
Term endedMarch 17, 2001
Application numberEP 81301126
Classification (CPC)C07D295/023

Timeline

Timeline From EPO dates

1982198419861988199019921994199619982000Application filedMarch 17, 1981PublishedSep 23, 1981Patent grantedAug 1, 1984Term endedMarch 17, 2001

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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