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STARCH MATERIAL. Julius Kantorowicz, of Breslau, Germany, assignor to Farbenfabriken of Elberfeld Co., of New York. Patent No. 785,216, dated March 21, 1905.

This invention relates to the manufacture of a new modified form of starch, which has the valuable property of swelling up with cold water to a viscous liquid-like starch-paste.” Such

paste," as is well known, can be obtained from ordinary starch only by treatment with hot water.

For the preparation of the new products any convenient kind of starch—“soluble starch,” dextrine, or the like—is mixed with an alcohol (ethyl alcohol, methyl alcohol, &c.) or any other liquid with which starch does not swell up-such as acetone, a mixture of alcohol and ether, or the like—and the resulting mixture is then treated with an aqueous solution of an alkali, neutralized, and the new products isolated.


Louis A. Dreyfus, of New Brighton, New York, assignor to the Muralo Company. Patent No. 786,348, dated April 4, 1905.

The product of this invention has the advantageous features of the well-known cold-water paints plus those of an oil-paintthat is to say, it is mixable at the time of application with ordinary cold water-and has the low cost and other advantages of cold-water paints, yet at the same time after application to the wall or other surface to be covered it presents a waterproof surface measurably the same and for some purposes substantially the equivalent the much more expensive oil-paint. It is adapted to use wherever either of these formerly-known paints are used either for interior or exterior applications. It is practically noninflammable, practically odorless, and perfectly sanitary.

The essential features of the invention are that as a waterproofing ingredient petroleum or its by-products, which in this composition serves all the purposes of an ordinary paint oil, yet, owing to the peculiar characteristics of petroleum, is essentially different from such oil, because it will not saponify when brought in conjunction with the other ingredients and is likewise substantially non-oxidizable, so that the objectionable features of saponification, which are well known in this art, and likewise those resulting from oxidation are avoided in my composition.

PROCESS OF MAKING NEUTRAL SOAP. August Paul Horn, of Hamburg, Germany. Patent No. 786,490, dated April 4, 1905.

According to the process forming the subject of the present invention certain decomposition products of albuminous substances are added to the primary components of the soap.

The following is the method of effecting the incorporation: Ordinary albuminous substances are first purified and freed from the adherent salts by dialysis. The product thus obtained is then decomposed by exposing it while under pressure to the action of heat by treatment with acids or alkalies or by some other suitable process. The albumoses obtained by this decomposition have the same structure and give the same color reactions as the native albuminous substances. Nevertheless they differ widely from the latter in many properties, viz: First, the albumoses are not coagulable; second, their behavior toward the salts which are to be precipitated from them differs from that of the native albuminous substances; third, the albumose-acid salts formed with alkalies are much more stable when hydrolyzed than are alkali albuminates, and, fourth, the albumoses have a stronger acid reaction than native egg-white or albumen. In view of their above properties the albumose preparations are eminently adapted for the production of soaps which remain neutral when hydrolyzed. The albumose preparations obtained by the above decomposition process are added to the soap ingredients either during the saponification process or else subsequently during the pilling operation. The soap thus produced is perfectly neutral and remains so on hydrolysis, for the alkali which is thereby set free becomes fixed while in statu nascendi as albumose-acid alkali. Hence the water used in washing remains perfectly neutral—an effect which is not obtained with any other soap.

SOAP AND METHOD OF MAKING SAME. Hermann Giessler and Herman Bauer, of Stuttgart, Germany. Patent No. 786,556, dated April 4, 1905.

This invention relates to the production of a soap which will combine cleansing, bleaching, and antiseptic properties without, however, being liable to deteriorate by decomposition or to injure or destroy the surfaces of goods to which it is applied.

The inventors claim that soaps possessing the above-indicated characteristics may be produced by mixing with a suitable soap body stable salts of the higher (super) acids, and particularly the alkali or ammonium salts of the higher (super) acid compounds of boron or carbon. These salts may be added to the soap body either alone (preferably in powdered condition) or mixed with fatty bodies free from glycerin.

The following salts are eminently suitable for the purpose of the invention on account of their high stability and of their high contents of oxygen, as well as on account of their easy manufacture: sodium perborate, (NaB0, or Na,B.03), or ammonium perborate, (NH,BO3), or sodium percarbonate (Na2C04). One of these salts or mixtures of two or more of them are added in a suitable condition, preferably powdered, to a soap body, which may be of any approved constitution—for instance, any of the usual soaps.

TREATING SHEEP'S WOOL. Albert Kann, of Heidelberg, Germany. Patent No. 787,923, dated April 25, 1905.

This process is based on the fact that if sheeps' wool or other keratinic fibres—that is to say, any kind of animal hair—are treated with a solution of formic aldehyde of the formula CH,0 for some time in the cold, or better in the heat, or by the vapors of formaldehyde and are afterward dried without preliminary washing, it will be found that by this treatment the fibre has become much less liable to be affected by the action of strong bases in the heat—as, for instance, caustic alkalies, carbonates of alkali, alkali sulphides, alkaline earths, &c.—as well as by the action of steam and of boiling in water of neutral reaction without diminishing in the whole the useful properties of the wool. The fibre so treated will resist better the action of the said chemicals and will not be shortened or shrunk.

If heat is used in the operation the length of time may be reduced.

PROCESS OF MAKING FELT CLOTH. James B. Levan, of Philadelphia, Pennsylvania. Patent No. 789,098, dated May 2, 1905.

The claims cover

1. The process of making felted cloth as herein described, consisting in cutting the material of which the cloth is to be made into short-length fibres, partially felting and dyeing and thoroughly drying it, then completing in warm oil the felting of the crude fabric so formed, and finishing the cloth with emery or other suitable paper or material and by pressing with a heated iron.

2. The process of felting cloth, which consists in felting the material while submerged in or saturated with warm oil.

3. The process of felting cloth, which consists in dyeing the material and felting same while submerged in or saturated with warm oil.

4. The process of felting cloth, which consists in felting the material while submerged in or saturated with warm oil and finishing the fabric while still thoroughly impregnated with oil by means of emery or other suitable paper or material.

PAINT COMPOUND. Louis Spencer Flatau, of St. Louis, Missouri. Patent No. 789,600, dated May 9, 1905.

This invention relates to an improved paint compound. It is designed more especially for use upon and for treating heated metal surfaces, more particularly the front ends and stacks of locomotive and other engines and like purposes.

The claim covers the process of producing a paint compound, which consists in reducing gilsonite by grinding to a powder; combining with naphtha said gilsonite in powder form by sifting the latter upon said naphtha; and adding to the aforesaid ingredients boiled linseed-oil and gloss-oil, and then thoroughly amalgamating this mixture by the agitating action of a mill.

TRIACETYL CELLULOSE. Arthur Eichengrün and Theodor Becker, of Elberfeld, Germany, assignors to Farbenfabriken of Elberfeld Co., of New York. Patent No. 790,565, dated May 23, 1905.

This invention relates to the production of a new acetylized derivative of cellulose. The process for preparing this new body consists in treating cellulose with a mixture of acetic anhydrid and sulfuric acid at temperatures below 50° C.

The new body thus prepared is a whitish voluminous mass and possesses very valuable properties. In a dry state it is readily soluble in chloroform, epichlorhydrin, nitrobenzene, and glacial acetic acid, soluble in acetone and pyridin and insoluble in alcohol ether, acetic ether, amyl acetate, and glycerin. It is not attacked by cold alkaline carbonates, ammonia, or dilute acids, and but with great difficulty by caustic alkalies.

The concentrated solutions, especially that in glacial acetic acid, have the characteristic property that on being poured into a liquid which does not dissolve the new acetylized cellulose such as water, alcohol, or formic aldehyde, or the like—they deposit peculiar cylindric precipitates, including a large quantity of the liquid. On drying the said precipitates shrink to hard oblong bodies. The new acetyl cellulose is decomposed on heating it to about 250° C.

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