Radio frequency (rf) weldable adhesive films
CA 2370893 A1 · Owner: The Dow Chemical Company · Inventors: Pettersson, Ing-Mari Gunnel; Kelch, Robert H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flexible, halogen-free films, both multilayer films and monolayer films can , replace polyvinyl chloride films in applications requiring high speed welding by high frequency radiation. The monolayer films result from a blend of a nonpolar olefin polymer and a polar olefin polymer that contains carbon monoxide. The multilayer films have like that of the monolayer films but located so as , to promote high frequency sealing. Products made from such films are particularly well suited for medical device applications.
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 May 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2022.
- 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.