Expired European patentEurope
Aqueous process for preparing amido-carboxylic acids by reacting an amino acid with a carboxylic acid anhydride
EP 0755375 B1 · Applicant: EASTMAN CHEMICAL COMPANY
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.
Why it's free to use
- Filed April 7, 1995 and granted October 13, 1999. A European patent lasts at most 20 years from filing, so its term ended April 7, 2015.
- 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 October 7, 2020.
- 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.
FiledApril 7, 1995
PublishedJanuary 29, 1997
GrantedOctober 13, 1999
Term endedApril 7, 2015
Application numberEP 95915609
Classification (CPC)C07C231/02
Timeline
Timeline From EPO dates
Sources & verification
Official EPO records
Everything on this page comes from the EPO record linked above. EPO data used under CC BY 4.0.