Process for chemically hardening wood and treatment solution therefor
CA 1290909 C · Owner: Gordy, John · Inventors: Gordy, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pulping agent for the chemical separation of lignin from cellulose in wood without damage to either component is disclosed. The pulping agent comprises the reaction product of (a) a loweralkanolamine with (b) a compound produced by electrolytic oxidation of the loweralkanolamine in an aqueous alkaline solution containing an acid addition salt of the loweralkanolamine. Also disclosed are processes utilizing such a pulping agent for chemically debarking whole logs as well as for converting soft wood into hard wood.
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 October 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 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.