The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 1977
Filed:
May. 01, 1975
Neil George Richardson, Montreal, CA;
Domtar Limited, Montreal, CA;
Abstract
A method of preventing the deposition of preservative solids onto the surface of the material being treated from an ammoniacal treating liquor of the type wherein deposition of the treating chemical within the wood requires evaporation of the ammonia from the solution. After the impregnation treatment the wood is contacted with an atmosphere containing carbon dioxide in an amount and for a time sufficient for the carbon dioxide to combine with a significant amount of the ammonium hydroxide in the treating liquor on the wood to form ammonium carbonate and/or bicarbonate and thereby inhibit the loss of ammonia from the liquor for a time sufficient for the liquor on the wood to migrate into the wood.