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CORHART REFRACTORIES CO

Overview
  • Total Patents
    263
About

CORHART REFRACTORIES CO has a total of 263 patent applications. Its first patent ever was published in 1930. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets materials and metallurgy, machines and thermal processes are POHANG FURNACE MATERIALS CO, SAINT GOBAIN TM K K and JIYUAN JINFENG REFRACTORY MAT CO LTD.

Patent filings per year

Chart showing CORHART REFRACTORIES COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Alper Allen M 19
#2 Mcnally Robert N 18
#3 Field Theodore E 17
#4 Field Theodore Estes 13
#5 Wehrenberg Thomas M 11
#6 Myron Alper Allen 11
#7 Nicholas Mcnally Robert 9
#8 Drake Douglas A 9
#9 Wehrenberg Thomas Milton 8
#10 Mcnally Robert Nicholas 8

Latest patents

Publication Filing date Title
DE4042681C2 Zircon refractory contg. uniform dispersion of unstabilised zirconia
DE4091550C2 Zircon refractory contg. uniform dispersion of unstabilised zirconia
WO9103439A1 Zircon refractories with improved thermal shock resistance
US4943544A High strength, abrasion resistant refractory castable
US4992396A Fused AZS refractory composition
US5106795A Chromic oxide refractories with improved thermal shock resistance
DE3842280A1 Refractory composition based on a molten mixture of alumina, zirconia and silica (AZS)
DE3836852A1 High-strength, abrasion-resistant, refractory castable mixture
US4657878A Method of making high density, fusion cast basic metallurgical refractory and the refractory itself
US3818112A Electrical furnace for melting glass
US3752895A Electric melting furnace and process of using it
US3751273A Burned basic refractory and batch therefor
US3726699A Burned basic refractory and batch therefor
US3703391A Electric melting furnace and process of using it
US3620782A Manufacture of fused cast basic refractory
DE1958441A1 Tin oxide electrodes of reduced electrical - resistance by cooling in inert atmosphere
FR2067870A5 Tin oxide electrodes of reduced electrical - resistance by cooling in inert atmosphere
GB1274450A Method of improving the electrical conductivity of sintered tin oxide electrodes
US3589919A Burned basic refractory and batch therefor
US3600206A Mgo-p2o5 fused cast refractory