Porous products manufactured from polytetrafluoroethylene treated with a perfluoroether fluid and methods of manufacturing such products
CA 2108278 A1 · Owner: Chung, Hoo Y. · Inventors: Chung, Hoo Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Porous materials suitable for a variety of uses including waterproof/breathable fabrics, air filters liquid filters, liquid/liquid separation membranes vascular grafts, mechanical seals, etc. which comprises an intimate combination of about 50 to 99.9 wt % polyetrafluoroethylene polymer and about 0.1 to 50 wt % of a fluorinated organic polymer which is liquid under ambient conditions such as the perfluoroether fluids, wherein the material has a microstructure characterized by nodes interconnected by fibrils.
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 April 14, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 14, 2014.
- 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.