Document xjNLdry89VDKaQLoqZdKEayy1

0. S. PATENTS 07 IMTftLST IS CONNECTION KITH MICAOPOrUTSi y Mo. 1.0AS.933 - December 3, 1912 - Charles H. Belknap (assigned to Armstrong Cork Company) A beat insulating material composed of an autoclaved mixture of dlatoaaeeous earth (75%), hydrated line (12#) and asbestos fibres (12$%). Motet This product was formerly marketed by Armstrong under the name "Nonpareil Insulation" but did not make head way in the market since it was too heavy in Weight (about 25 lbs. per cubic foot) and too expensive (due to the high cost of Infusorial earth). ' Mo. 1.201.086 - November 7, 1916 - S. R. Sutcliffe Autoclaved mixture of sand (4 to 5 parts), line (1 part) and asbestos fibre (15% of the finished weight). The mixture is compressed in a mold, to expel the water. The patent then goes on to state "I then clamp a amber of such sheets or slabs together so as to retain them under pressure and I place the sheets within a ehaaber where they may be subjected to the action of steam......." < Mo. 1.223.834 - April 24, 1917 - lilliam Sanger Manufacturing shingles by autoclaving a mixture of cmnent (80 parts), asbestos (15 parts) and "chemically active precipitated anhydrous silica" (5 parts). Mo. 1.335.038 - March 30, 1920 - C. B. Ayers Manufacture of artificial stone composed of lime (20 parts), silica (6 parts), soapstone (8 parts) and asbestos fibre (2 parts). The patent does not state whether the aaterial is self-hardening or whether it must be autoclaved. It does explain the addition of ."finely divided soapstone", "for the purpose of reducing the porosity and weter-absorbing capacity and improving the surface resistance and polish of the resultant stone". No. 2.016.796 - October 6, 1935 - Arthur S, Brock and Carl F. Meinzer Manufacturing molded building materials by autoclaving a mixture of pulverised, water-granulated slag (more than 90%) and sodlta silicata (lass than 10%). The patent states* Among the benefits secured in steam curing under pressure may be mentioned! 1. The compressive strength usually obtained through a slow process covering fourteen to twenty-eight days or more, is obtained in eight to twelve hours of steam curing under pressure. 2. The volume change or shrinkage of products cured by the usual methods during the drying-out period, Is greatly reduced or practically eliminated when steam curing uadsr pressure le used. 3. Products which are steam cured wider pressure dry out rapidly to_a_praetically constant amount_of moisture im about forty-eight hours after removal froa the kiln. 4. Due to the combination of the above three character- 01-0213913 GAF 22737 Article*i *ths Rurfa*tur of Artificial Stone nr Sand-line Brink", tv f. T. Feppel, Ohio Geological Survey, lulletln Bo* 5, Tko Springfield Publishing 6e., Springfield, Obio, 1905. Artificial 8111mtee with lefereae* to iwrptwu SUlon", By 1* B. VUliaas, p. r6, Bulletin Bo. 11, Xlllscla State Geological Surrey (leer Book for 190S), Fufeliahad fey University ef Illinois, Urbans, XU., 1909* *1 Study ef Sand-line Brick*, by S. T. Purr ui ?. B. Ernest, Illinois Geological Surrey, Bulletin Ho. IS, Illinois State Journal Co,, Springfield, 111., 1912. Bria'c* and Artificial Stone* of loo-pLeetle Baterials*, fey 1. B, Secrl*, Pub lished toy J. ft 1. Churchill, London, 1915. "A Her Synthetic Stone*, fey H. C, Peffer, B. L. Harrieou and R. B. Shrere, Jourral Industrial ft topineerint Chealstry, *o.. 25, page 719, 1955. Article fey . A. Tlgfueeon. 0, M. Bates and T. Thorvaldsen, Canadian Journal *aecrrch, *ol. 11, par* 520, 1934. Dleteueeeou* Berth - Iqnlliferlua and Rata ef fiatclien in the Syetan Hydrated Line - lictoocceoua Silica - Veter*, fey A, 8. Cuaelns ft L. ft. Hiller, Journal Industrial ft Engineering Cfeaaistx7, fol, 26, page 683, 1934* Celeiun Nydrosilieete as e Building Setsrlel*, fey 0. Anderegg, Jenreel Inourtriel ft Engineering Cbaaiatry, *#1. 27, peg* 1019, Sept, 19J5, Fomrtloo of Eycreted Calcine Silicate* at Hcrated Temperatures and Pr*uri', fey E. F. Flint, E. F. KcJ&rdie ft l. S. Valle, Research Feper Ho. 1U7, Rational Bureau ef Standard*, VaeMngton, B. C., 1938, KAiO. (2/6/42) 01-02ij9J4 GAF 22738