Sawdust compositions
CA 1112034 A · Owner: James, Trevor M. · Inventors: James, Trevor M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fire extinguishing or fire preventing composition comprising sawdust combined with a dry colouring material which reacts with the sawdust at elevated temperatures to improve the fire extinguishing properties. In one form the colouring material comprises a transition metal compound such as ferric oxide Fe203 which forms complexes with glucose units derived from the cellulose in sawdust. In another form the colouring material is organic, for example, an azo-compound which forms a complex with the cellulose in the sawdust and, this also improves the fire extinguishing properties.
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 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 1998.
- 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.