Fire retardant for woody materials
CA 1279428 C · Owner: Kobayashi, Nobuo · Inventors: Kobayashi, Nobuo; Imai, Tsutomu; Yamamoto, Hisaomi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fire retardant for woody materials which is, an aqueous solution comprising 100 parts by weight as solids content of a water-soluble 3-(dialkylphosphonopropionamide) represented by the following general formula wherein each of R1 and R2 represents an alkyl group having 1 to 3 carbon atoms and, R3 represents a hydrogen atom or a methyl group, and at least 100 parts by weight as solids of a watersoluble melamine resin as essential ingredients and having a pH of not more than 3.
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 January 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 2008.
- 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.