Vacuum assisted application of thin vapor permeable, liquid impermeable coatings on apertured substrates and articles produced therefrom
CA 2201475 C · Owner: Ray, Carl D. · Inventors: Chang, Peter I.; Mcbride, Robert K.; Ray, Carl D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the manufacture of a vapor permeable liquid impermeable , composite material (10 12) comprising a three-dimensional apertured substrate (12) having a vapor permeable, liquid impermeable coating material (10) thereon, the substantially liquid impervious composite material and an , apparatus (38, 40, 42, 46, 48) for making the composite material are , diclosed. Successive portions of a continuous sheet of an apertural substrate are passed into contact with a continuous moving perforated member. The coating material is supplied onto the substrate. The coated substrate is subjected to a vacuum which causes the coating material to flow onto the substrate material, and in …
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 27, 1995 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2017.
- 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.