Expired European patentEurope
1-Alkyl-2-isocyanatomethyl-isocyanato-cyclohexanes and/or 1-alkyl-4-isocyanato-methyl-isocyanato-cyclohexanes and the like diamines, processes for their preparation, and use
EP 0128382 B1 · Applicant: BASF Aktiengesellschaft
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
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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 May 14, 1984 and granted September 27, 1989. A European patent lasts at most 20 years from filing, so its term ended May 14, 2004.
- 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 November 14, 2009.
- 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.
FiledMay 14, 1984
PublishedDecember 19, 1984
GrantedSeptember 27, 1989
Term endedMay 14, 2004
Application numberEP 84105472
Classification (CPC)C07C265/10 +1 more
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.