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CALIFORNIA PORTLAND CEMENT CO

Overview
  • Total Patents
    44
About

CALIFORNIA PORTLAND CEMENT CO has a total of 44 patent applications. Its first patent ever was published in 1920. It filed its patents most often in United States, Canada and Germany. Its main competitors in its focus markets materials and metallurgy, thermal processes and chemical engineering are ETS POLIET & CHAUSSON, ROLFSEN OLE and SALZHEMMENDORF DOLOMITWERK.

Patent filings in countries

World map showing CALIFORNIA PORTLAND CEMENT COs patent filings in countries
# Country Total Patents
#1 United States 35
#2 Canada 3
#3 Germany 2
#4 United Kingdom 2
#5 France 1
#6 Sweden 1

Patent filings per year

Chart showing CALIFORNIA PORTLAND CEMENT COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Bechtold Ira C 9
#2 Kaiser Harry E 7
#3 Herz Joseph H 6
#4 Hanna Wilson C 4
#5 Romig John R 4
#6 Tabikh Ali A 3
#7 Olsen George F 3
#8 Campbell William C 3
#9 Dahl Louis A 3
#10 Burke Richard J 2

Latest patents

Publication Filing date Title
US3989443A Multiple fuel burner and usage in rotary kilns
DE2224049A1 Rotary inclined cement kiln - automated control of fuel supply and speed
US3682453A Rotary kiln nose ring
US3627287A Rotary kiln control apparatus and programming
US3685257A Cleaning of filters using vortex rings
US3592454A Formless installation of materials lifters and kiln lining
US3563521A Materials lifter construction and installation in kilns
US3482452A Apparatus and method for monitoring surface area of flowing comminuted material
US3389321A Frequency sensing detector for stopping a motor upon slowdown
US3229836A Cement sack pallet and handling equipment
GB949130A Kiln control method and apparatus
US3091443A Kiln automatic control method and apparatus
US3091442A Kiln control method and apparatus
US3027456A X-ray fluorescent analysis sample presenting means
US3075079A X-ray fluoroscopic analysis
US3011726A Cement raw mix and clinker grinding mill control system
US2696892A Gas humidifying and electrical precipitation system
US2616488A Fuel burner
US2659449A Humidifying system for dust and fume collection by electrical precipitation
US2318306A Feed system for grinding mills