Waterproof, breathable rainwear and waterproof articles of foam plastic
CA 2122308 A1 · Owner: Jager, Jan · Inventors: Vrouenraets, Cornelius Martinus Franciscus; Jager, Jan; Van De Ven, Henricus Joannes Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is the use of a laminate of a textile material covered with a copolyetherester film having a water vapor transmission rate of at least 1000 g/m2/day for the manufacture therefrom of waterproof rainwear shoes, tents, and mattress covers, and for the complete covering therewith of molded articles of foam rubber for use in chairs or mattresses, the copolyetherester being composed of a plurality of recurrent intralinear long-chain ester units and short-chain ester units which are randomly joined head-to-tail through ester bonds, with at least 20 wt.% of the long-chain ester units being prepared from a long-chain glycol having a carbon to oxygen ratio in the range of 2.0 to 2.4, which …
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 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2016.
- 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.