Zinc-containing magnesium oxychloride cements providing fire resistance and an extended pot life
CA 2081765 C · Owner: Pyrotite Corporation · Inventors: Policastro, Peter P.; Tarneja, Raj S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fire barrier composition in the form of x zinc-containing magnesium oxyehloride cement is described. The composition exhibits a prolonged pot-life as weld as reduced thermal popping when applied to a substrate as a coating. The fire barrier composition can be used for rendering a flammable substrate fire resistant and for encapsulating lead paint.
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 May 17, 1991 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2013.
- 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.