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:
Aug. 10, 1976
Filed:
Feb. 07, 1975
Applicant:
Inventors:
Nicholas P Greco, Pittsburgh, PA (US);
David A Webb, Valencia, PA (US);
Assignee:
Koppers Company, Inc., Pittsburgh, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C09D / ;
U.S. Cl.
CPC ...
106 / ; 1062 / ; 1062 / ; 106284 ; 2606 / ; 2606 / ; 2606 / ; 208-2 ;
Abstract
An improved creosote wood preservative that has a light color and that forms a non-sticky crud deposit is prepared from a coal tar creosote. The coal tar creosote is reacted with one or more of the following groups of neutral compounds: paraformaldehyde, trioxane; or nitrobenzene, nitrotoluene, nitroxylene, tris (hydroxymethyl) nitromethane; or aluminum, zinc or sulfur, to produce a reacted creosote. This reacted creosote is distilled to yield a distillate, which is the improved creosote wood preservative, and a pitch residue.