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:
Jun. 21, 1988
Filed:
Apr. 04, 1986
Applicant:
Inventors:
Rune Simonson, S-433 64 Partille, SE;
Knut Lundquist, S-417 42 Goteborg, SE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; C09D / ; C08L / ; B05D / ;
U.S. Cl.
CPC ...
427440 ; 106 1834 ; 1061631 ; 428541 ; 428907 ;
Abstract
A method for the impregnation of wood to prevent attack by harmful agents such as decay fungi or mould fungi and bacteria by the application of an aqueous solution of an alkali lignin modified into a water-soluble form. Impregnation takes place in two stages, these being an initial stage in which the aqueous solution containing the lignin still in its water-soluble form and with a pH not exceeding 10 is applied to the timber, and a second stage in which the lignin is fixed as a water-insoluble form by the application to the timber of a weakly acidic aqueous solution containing metal ions by the addition of metal salt.