Fibrous mat-faced gypsum board
CA 1309831 C · Owner: Randall, Brian G. · Inventors: Randall, Brian G.; Lehnert, Charles W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fibrous mat-faced gypsum board is provided for, use in an exterior finishing system for a building including, particularly an exterior insulation system and for use in a shaft, liner panel and a shaft wall assembly. The gypsum board has a set gypsum core faced with a fibrous mat. The core includes one or more additives that are effective in improving the waterresistant properties of the board in an amount at least sufficient to impart to the board improved water-resistant 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, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 10, 2009.
- 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.