Foam laminates which include astm e-84 class 1 rated foams
CA 2026258 C · Owner: Nicola, William J. · Inventors: Nicola, William J.; Reichmann, Wolfgang W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foam laminate comprising a polyurethane foam core sandwiched between two facing material wherein said foam core, has: a flamespread as determined by ASTM E-84 of 25 or less a, smoke density as determined by ASTM E-84 of less than 450 a, dimensional stability measured as a % volume change as determined by ASTM D-2126, after 28 days (1) at -30°C of no more than 1, (2) at 100°C of no more than 8 and (3) at 70°C and, 100% relative humidity of no more than 12 and a firmness of no, more than 0.6 centimeters after 5 minutes. The foam core is produced by reacting: a polymethylene poly(phenyl isocyanate) based isocyanate, one or more aromatic polyester polyols having hydroxyl functionalities of …
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 September 26, 1990 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2012.
- 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.