Document zoVjR1g0d4KEn3abzMpodBnNm

K-13044 CSTAIUSHCOtSOZ E. I. d u Po n t d e Ne mo u r s & Co mp a n y INCORPORATED PIGMENTS DEPARTMENT J. W. MINNICH NEWPORT E. F. KLenke, } J. N. fully/A. Siegel, Newark 1 : | '$ c NEWARK, NEW JERSEY JUNE IS, 1954 '`x PHTHALOOYANTNF, BEgRiUBH SEPQRTS Ref; Your letter of June 11, 1954 lour request that we assist you in the procurement of a complete file of all KN Reports on Phthalocyanine Research has been considered by the Chemical Division. We are prepared to meet this request with the exception that we will not release reports on current A-H and A-HI Research, but copies of these will be supplied if and when this work reaches the stage of plant development. Also, we are making a search in the case of highly speculative studies which were carried out in the past (for example, evaluation of competitive patents) and which lead to nothing of practical interest. In line with this policy, we are agreeable to having Hr. Klenke transfer to your files all of the reports listed in the reference letter, with the exception of KN-46-53 and KN-53-37. The former does not deal with pfathalocyardLnes and the latter involves competitive patent evaluation. We request Hr. Klenke to return both of these to Newark. | | We have reviewed the complete list of Phthalocyanine Reports related to products made or intended to be made at Newport. Same of the following may be of interest to you and we are prepared to supply copies if you feel you would like to have them. These may be grouped as follows; Patent Survey KN-46-54: General Patent Surrey -Phthalocyanine pigments - A.J. Stratton General Patent Survey -Phthalocyanine Pigments 1A. J. Stratton Analytical Studies | KN-47-34* Detection of Iron Phthalocyanine in CPC - A. H. Gberle KN-53-23; Effect of Chlorine in CPC on Spectrophotometric Curve of Sulfuric Acid Solutions - C. W. Manger BETTER THINGS FOR BETTER LIVING . . . THROUGH CHEMISTRY 1. E. I . d u Po n t d e Ne mo u r s S Co mp a n y INCORPORATED FIGMENTS DEPARTMENT Physical Studies KH-4B-3: Particle Size and Dimorphism - B. H. Perkins KB-50-15: Spectrophotometric Method for Numerical Designation of Flocculation - A. E. Banks KN-50-16: Crystal Growth of Phthalocyanines A* R. Hanke KN-50-1S: Flocculation Studies by the Spectrophotometer - A* R. KN**52~3: Crystal Growth and Flocculation in Paint Systems - A* KN-51-32: Blue BG - Particle Size Distribution * A. R. Hanks KN-52-1: Blue LB - Particle Size Distribution - A. R* Hanke Process Studies KtW-5: Chlorine-Free CPC Synthesis - B. H. Perkins KN-A7-51* Bine LB - Process Studies - F. F* Ehrich KN-49-37: Rypochlorite Treatment of CPC Green - F. F. Ehrich KN-51-42: Phthalocyanine Plant Aseistanee - January, 1950 - July 1, 1951 - P D* Graham KN-54^12: "EF Process - E. F. Klenke We have not Included any Phthalocyanine Reports related to work done on products of Orchem manufacture, nor have we listed reports dealing with the development of special laking procedures used at Newark. Reports in the former category are now largely of historical interest j but the latter group may be useful to you if and When Newport should undertake the finishing of CFCts. ;; H. COOPER bl CHEMICAL DIVISION : 'St';. ' ' b e t t e r t h in g s f o r b e t t e r l i v i n g . . . t h r o u g h c h e mi s t r y DUP050068694