Porous films and process
CA 2358274 A1 · Owner: Young, David Hamilton · Inventors: Young, David Hamilton; Brown, Albert Benner; Gebhard, Matthew Stewart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Porous films are provided which include a blend of a film forming polymer and a non-film forming material, the film having a network of pores or channels, throughout the film. The porous polymer films are formed between 0° and 80° C, retain porosity at elevated temperatures and are non-friable. A process for preparing porous polymer films and their applications are disclosed.
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 October 5, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2023.
- 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.