Document K6KBoJjMvQD1B1Kyy2bjd47DK

F. O. CASE M A NAG ER OF MIDWEST DISTRICT November 24, 1937 20 N.WACKER DOIVS CHICAGO. ILLINOIS Mr. Frederick Laist, Vice-President, International Smelting and Refining Company, 25 3roadway, New York City. Dear Mr. Laist: Enclosed you will find a letter from Mr. G. E. Johnson and the original copies of petition and assignment for the new proposed patent application for producing white lead. As Mr. Johnson indicates, we were all very pleased with Mr. McCarthy's work. FOC:vie ends PNTC0C00S539 November 22nd, 1937 Mr. 7. 0. Casa, Manager of Midwest District, International 3meltg. and Rafg. Co., 20 North Wao'tar Drive, Chioago, Illinois. Dear Mr. Casa:- Wa have carefully studied the lnfo?Bntt4oa Submitted by Mr. McCarthy with Mr. Dalst's lctter^af^Novcabsr lsV/hogarding //the proposed patent application far^rnca^hod of producing white lead. \\ \> The proposed application cover* lbs additional clalas we had in mind, and if these claims ara'allowsd by the Patent Offiee we will have preotloally'cbtnol^e coverage on the addition of an alkali to the aprtyte. As ym^now. Patent No. 1,843,713 oovers control of %if$lff5~'bjOt3io addition of an: acid. We belike that Mr. CCsrthy has very skillfully prepared the application, and preloped a good point on Page 2, line 26. which covers the adjj nent of the sodium concentration of tha^$o^2Cg*troxykep by ltlon of catholyte to enolyte, and to catholyte."--2n_wiah to suggest that this point might Irered in several additional olalms. wish to suggest the following minor corrections McCarthy's eonaldcratloni PageT"^ end of line 23 "of a selected oaaposltlon" Page 7 - line 7 Should not the word sodlua bicarbonate be emitted? The catholyte contains soae NeCH or a basic carbonate salt but, we believe it would be sufficient to describe the catholyte as merely a solution containing sodlua carbonate. Page 7 - line 20 0.561$ incorrect. Should read 0.0561$ pNy. c00 00q 5<>0 N11459.01 Sheet #2 - Mr. F. 0. Case November 22nd, 1937 Page 8 - line 1 last word In line "neighborhood* eould be changed to below or lees than .064 Claims No. 12 - line 12 ) " "Id " 12 ) " "15 " 12 ) In place of "not less than about .064". preferable to state that the earbouuw contents of ftawuoLuuldulybtee should be at a value of about .064 or less. C000065*. PN*