Expired European patentEurope
Process for the preparation of pulverulent polyurethane varnishes free from blocking agents, that have an extended pot life and are curable above 120 degrees centigrade, and pulverulent polyurethane varnishes prepared by this process
EP 0045994 B1 · Applicant: HÜLS 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 August 10, 1981 and granted October 23, 1985. A European patent lasts at most 20 years from filing, so its term ended August 10, 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 February 10, 2007.
- 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.
FiledAugust 10, 1981
PublishedFebruary 17, 1982
GrantedOctober 23, 1985
Term endedAugust 10, 2001
Application numberEP 81200890
Classification (CPC)C08G18/8012 +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.