Document yqbbjpNnJ3ZDGgjMVjG4JkzV

V lr. T* 0*' Co*kb Messrs. taco tad Outig J-M - Hicfe nVPZRATORI ISS7LA.TI01 or. 29, 1945 #* X sail your attention to tho following U.8. patent jnst liritd to Johnsaawllle Corporation! lo. 2,148,549 - Boveaber 6, 1945 - B. A. Ylesvlbaoh nd S. IU lillian* This product mm* to bo soneehat along tbo 11a* of our Caltill to tad it proparod fron a alxturo of diatoaaaooua slllM, bentonite, uptilia carbonate, asbestos fibres, for whieb It lo olalaod, ertug otbor things! a (a) that It 111 withstand toaperaturoo ap to 2000f. (b) That It map bo moldod to proela* dimensions without usduo shrinkage r leas la mat*rial 1b tho form of trimming motto. (e) That It ha* lmprowod strength and insulation walut owar tho full tonpormturo range. You will not* that this mixture it set la tho mold bp steaa curing, and ac cording to tho patost, 1* virtually of a 'precision moldod* typo similar to Plant Itabber A Asbestos magnetic. Tho basla of tho invention consists in tho typo of dlaton&eeoua silica which is mood. The particular points of latarest to us in oonaactloo with our Calslllto formula arti 1. Tho use of Mlelaod dlatomaeoous slllM la tho prases* of a snail amount of csddlia carbonate. 2* Tbo lacorporatioa of a small percentage of magnaalu* carbonate. Tbo lacorporatioa of o saall parcantag# of bontonlto, which la claleed to met with tho sIUm, forming a 'strong alii cate*. X aa sending copies of this letter to Messrs, taka and Oitlg, so that they may study owar the patent in question. BAtS, Proaidant t 01-0213927 GAF 22751  1 -Canadian P a ta rit No. 392,480 November 12, 1940 G. B. Brown (A a ix tu ra o f asbestos, hydrated lin o d la toHiacgoua e a rth , la shaped a g a in st aandf i l t e r and hoote d to e ffe c t a re a c tio n o f the la s t two 1 ; 01-0213928 GAF 22752