Document Nx93xgRMQ4oG3o7Kdo42qokQ

FOR INFORMATION - *3? * '0-3< BH *J*X* &m8X9 M# 7# ltd* **98* IM, ** 1.168 BAfXOHAX. PMBI WMOTdTQH, e. e. taffijs Wo :!> taxing: off the exploitation in this Mv of * iifisn process for $1* production of lead oxide# and atetme of lead and lead oxide with silica* Vari ous features of this development are covered by termam Patents 5S4f9$7 andS9(,d6X and we understand that corresponding t*# applications have been filed* ; ' the process used is briefIp as head is melted in a suitable vessel* Sand i# stirred into- the molten lead* as a result of which the send 'becomes coated with lead* -Air is then' admitted and agitation is eontinned until the desired degree of oxidation is attained* the sand serves as a dispersing agent for the lead end permits more uniform and rapid oxidation than is possible merely by passing the air through- molten .lead* the limits of oxidation are from lend ponder containing 90s fb end low PbO to complete oxidation to ih*$** depending upon the purpose for which the material .Is to- be used* After the oxidation is completed, the lead lead oxide may be separated from the silica by screeninf tation or other suitable means* However, in the phase c proposition In which we are" particularly interested, no separa tion is employed, the mixture of silica .and lead and lead oxide being need directly for the production of lead glasses, vitreous enamels or the like* We would like yam to make a search of active f*f* patents to determine possible infringement! by the method of oxidation used by the PbO-silica mixtures as a product,- and- {&) by the use of such Droducts in the manufacture of lead 'glasses or camels* FOR INFORMATION - DO NOT PliM "Si"ftC-MOt SBU i44 SH w ag es s* Msm> bs q * zwm m wm* It appears that mm of the broad elaias of our Carvetfc patent X,6ESi473L say be infringed by the process. This patent* of course, will not bo a bar to our operations* 1 representative of the German company controlling this development la to bo boro m Wednesday of next week to dis cuss the proposition, We realise that It -trill probably be im possible for you to mite any -extensive search in tine to have a report here by Wednesday* However, we would appreelatevery ameh having any Information that you cm give ms by -that dote* 0. B* Stone fAfSHf SlfiSlSW miss DUP050028644