Combined stain and filler, and drying oil therefor

Claim 1

A PARTIALLY-NEUTRALIZED LINSEED OIL-ALPHA,BETA UNSATURATED DICARBOXYLIC ACID CONDENSATION PRODUCT RESULTING FROM (A) THE CHEMICAL CONDENSATION OF FROM 6 TO 9 PARTS OF AN ALPHA,BETA UNSATURATED DICARBOXYLIC ACID SELECTED FROM THE GROUP CONSISTING OF MALEIC ACID, MALEIC ANHYDRIDE, FUMARIC ACID, AND MIXTURES THEREOF, WITH A COPLEMENTARY AMOUNT OF FROM 94 TO 91 PARTS OF A LINSEED OIL PRODUCT SELECTED FROM THE GROUP CONSISTING OF LINSEED OIL AND ALKALI-REFINED LINSEED OIL, AND (B) THE NEUTRALIZATION WITH AMMONIA OF FROM 40 TO 70 PERCENT OF THE RESULTING ACIDITY OF SAID CONDENSATION PRODUCT, SAID PARTIALLY-NEUTRALIZED CONDENSATION PRODUCT BEING CHARACTERIZED: (A) BY ITS ABILITY TO FORM A CLEAR AQUEOUS SOLUTION WHEN ONE PART BY WEIGHT OF THE SOLIDS OF SAID CONDENSATION PRODUCT IS MIXED WITH ABOUT ONE-FOURTH PART BY WEIGHT OF ETHYLENE GLYCOL MONOBUTYL ETHER AND WITH A TOTAL OF ABOUT THREE-FOURTHS PART OF WATER BY WEIGHT, AND (B) BY ITS ABILITY TO FORM A DRY, ADHERENT, NON-WATER-SENSITIVE, PROTECTIVE FILM WHEN A COATING OF AN AQUEOUS SOLUTION AS DEFINED IN (A) ABOVE IS APPLIED TO A NON-POROUS SURFACE AND ALLOWED TO DRY.