Expired Canadian patentCanada
Film materials based on multi-layer blown microfibers
CA 2114147 C · Owner: Joseph, Eugene G. · Inventors: Joseph, Eugene G.; Rustad, James A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extensible transparent film is provided having a continuous phase of a low modules or elastomeric material and an included affray of entangled microfibers. The film turns opaque and increases moisture vapor transmission when stretched.
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 August 11, 1992 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 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.
FiledAugust 11, 1992
GrantedDecember 16, 2003
Term endedAugust 11, 2012
Patent numberCA 2114147 C
Classification (IPC)D04H1/56 +2 more
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.