Graft polymer based on ultrahigh-molecular-weight polyethylene
CA 2051827 A1 · Owner: Hoechst Aktiengesellschaft · Inventors: Hobes, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Frankfurt, 26.09.1990, PAT bin-dan Hoe90/Y014 Hoechst Aktiengesellschaft, 6230 Frankfurt am Main 80 Abstract of the disclosure, The present invention relates to a graft polymer built up on ultrahigh-molecular-weight polyethylene having a molecular weight of ? 1,000,000 g mol-1 as the base polymer and an alkenecarboxylic acid or alkenecarboxylic anhydride as the graft monomer and having modified and improved properties compared with ultrahigh-molecularweight polyethylene, and to the preparation and use thereof.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed September 19, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 19, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 19, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.