Wood treatment composition and process
CA 1298942 C · Owner: Albright & Wilson Uk Limited · Inventors: Smith, Kevin Michael; Condlyffe, David Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions for flame proofing wood e.g. in the form of aqueous solutions containing tetrakis (hydroxymethyl) phosphonium salt methylolmelamine with at least 3.5 optionally alkylated hydroxymethyl groups per melamine nucleus, a polyfunctional nitrogen compound with at least 2 N-H groups e.g. urea and a base e.g. triethanolamine.
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 April 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 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.