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PHILADELPHIA QUARTZ CO

Overview
  • Total Patents
    242
About

PHILADELPHIA QUARTZ CO has a total of 242 patent applications. Its first patent ever was published in 1913. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets materials and metallurgy, chemical engineering and basic materials chemistry are INST STRUKTURNOJ MAKROKINETIKI, NANOMATERIALS RES CORP and INST STRUKTUR MAKROKINET AN.

Patent filings in countries

World map showing PHILADELPHIA QUARTZ COs patent filings in countries

Patent filings per year

Chart showing PHILADELPHIA QUARTZ COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Baker Chester L 27
#2 Sams Robert H 17
#3 Garton Emblem Harold 15
#4 Weldes H 11
#5 Netting David I 11
#6 Wilhelm Weldes Helmut Hans 11
#7 Pierce Richard H 9
#8 Weldes Helmut H 8
#9 Mccready Newton W 8
#10 Carter John D 7

Latest patents

Publication Filing date Title
GB1527155A Preparing alkali metal silicate glass
US4042313A Method of imparting color to fires
DE2542609A1 Stable alumina dispersions prodn - by mixing alumina vigorously with hydrochloric acid soln
US4029514A Method of precipitating microfine silica using phosphate
US3960532A Preparing alkali metal silicate glass with bubbles
US3967972A Soluble silicate disks
US4008173A Defoamer composition
US3961022A Silicate dissolving
US3966893A Precipitating α alumina monohydrate
US3935023A Alumina dispersions
DE2436158A1 Stable aq. alumina dispersions for paper impregnation - to reduce sliding tendency
US3929439A Method for preparing a highly siliceous alkali metal silicate glass and hydrated powder
US3931036A Compacted alkali metal silicate
US3960583A Method of preparing modified hollow, largely spherical particles by spray drying
US3954659A Method of forming stable dispersions of alumina
US3898318A Silicate dissolving
US4018622A Fluxing agent for removing inorganic deposits from smelters and furnaces
US3918921A Process for making granular hydrated alkali metal silicate
US3959274A Preparation of alkali metal and quaternary nitrogen double salts of silicic acid
US3794475A Method of preparing soluble silicate flakes or fibers