Expired European patentEurope
Control of molecular weight and end group functionality in polymers using unsaturated peroxy compounds as chain transfer agents
EP 0500575 B1 · Applicant: COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION
Overview
The published document from the EPO: abstract, claims, description and drawings. Open it full size
Read the whole patent
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 October 30, 1990 and granted June 11, 1997. A European patent lasts at most 20 years from filing, so its term ended October 30, 2010.
- 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 April 30, 2016.
- 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.
FiledOctober 30, 1990
PublishedSeptember 2, 1992
GrantedJune 11, 1997
Term endedOctober 30, 2010
Application numberEP 90915725
Classification (CPC)C07C409/38 +2 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.