Fillers
CA 1262811 C · Owner: Imperial Chemical Industries Plc · Inventors: Rolfe, Nicholas; Woode, Richard D.A.; Rothon, Roger N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of a material of empirical composition MgO(CO2)b(H2O)c, where b is any value in the range 0.5 to 1.1 and c is any value in the range 0 to 2 and, which have an amorphous content of at least 75% by weight, as a filler and/or a fire retardant for a solid or fluid matrix, a solid or fluid matrix (in particular a plastics matrix) containing such a material as dispersed particles, the materials in defined particulate morphologies, some of the materials per se and a process for their preparation.
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
- Granted November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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.