Plasticised gypsum composition
CA 2084494 C · Owner: Accuflex Products, Inc. · Inventors: Koldyk, Gerard Henry; Pap, Frank; Roosen, Peter Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition comprising gypsum plasticised by a polymer and containing gypsum in the range of about 40% to about 90% by weight. In a preferred embodiment the polymer is polyurethane. A wide variety of applications of the composition are described.
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 December 3, 1992 and granted June 24, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.
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.