[D8846AAJ], Letter from Dyer and Seely to Thomas Alva Edison, February 24th, 1888


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[D8846AAJ], Letter from Dyer and Seely to Thomas Alva Edison, February 24th, 1888

Editor's Notes

"Your application No. 290, filed Feb. 28, 1881, now has this claim pending: ### 'As incandescing conductor for an electric lamp, a flexible high resistance filament of graphite or plumbago, substantially as set forth.' ### This claim is rejected, principally on certain English patents which describe thin strips or pencils made of graphite. These of course do not meet the claim but the Patent Office requires that you shall furnish specimens made by your invention, and we can do nothing further with the case unless such specimens are furnished. If you think the matter worth prosecuting we must have the specimens here not later than March 2d next. The application describes the process of making filaments by pressing powdered material into sheets and then stamping the loops out of such sheets. ### If you don't care to go on with the case please let us know." TAE marg: "I cannot except at great expense prepare this as it requires highly polished flat steel plates + a powerful Hydraulic press neither of which I have at present, the Examiner must know that plumbago is one of the nicest things to press that is possible + [unclear] sharp + flat true dies an can be punched in exceedingly their filaments. Can't you beg off-I want to get broad claim another idea of [unclear] then carbon sheets + purchasing filaments out of such seets as I think the future will bring it into prominence." E




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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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