Coated fibrous mat-faced gypsum board resistant to water and humidity
CA 1341084 C · Owner: Georgia-Pacific Gypsum Llc · Inventors: Randall, Brian G.; Green, George W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a gypsum-based panel comprising a gypsum core faced on at least one surface thereof with a mat comprising mineral fibers. The surface of the mineral fiber mat is covered with a substantially humidity and water-resistant resinous coating to the extent that substantially none of the fibers protrude from the coating. The coating has a surface water absorption value as measured by the Modified Cobb Test, of no greater than about 2.4 grams. The coating of the invention is capable of bonding with Portland cement-based mortar.
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 August 15, 2000. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 15, 2017.
- 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.