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GEVAERT PHOTO PRODUCTEN NAAMLO

Overview
  • Total Patents
    36
About

GEVAERT PHOTO PRODUCTEN NAAMLO has a total of 36 patent applications. Its first patent ever was published in 1923. It filed its patents most often in United Kingdom, United States and Switzerland. Its main competitors in its focus markets optics, basic materials chemistry and organic fine chemistry are PHOTO CHEMICAL COMPANY LTD, LYMAN CHALKLEY and MARIO MICHELS.

Patent filings in countries

World map showing GEVAERT PHOTO PRODUCTEN NAAMLOs patent filings in countries
# Country Total Patents
#1 United Kingdom 32
#2 United States 2
#3 Switzerland 1
#4 Germany 1

Patent filings per year

Chart showing GEVAERT PHOTO PRODUCTEN NAAMLOs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Dormael Andre Emile Van 5
#2 Naamlooze Vennootschap Gevaert 1
#3 Duden Johannes W A 1
#4 Merck Philibert Leopold Joseph 1
#5 Antoon Duden Johannes Willem 1
#6 Jennen Jacob Joseph 1
#7 Jennen Jacob J 1
#8 Alfons Ausloos Karel Jozef Eug 1
#9 Rott Andre 1
#10 Smet Polydoor Frans Florimond 1

Latest patents

Publication Filing date Title
GB670799A Improvements in and relating to photographic silver halide emulsions
GB663190A Improvements in and relating to the production of colour photographic images
GB636988A Improvements in and relating to the production of colour photographic images
GB638039A Improvements in and relating to the production of colour photographic images
GB647354A Improvements in and relating to the manufacture of light-sensitive silver halide emulsions
GB673061A Improvements in and relating to the sensitation of photographic silver halide emulsions
GB637815A Improvements in and relating to a process for preparing polymethine dyestuff-intermediate products and polymethine dyestuffs
GB646137A Improvements in and relating to the sensitising of photographic emulsions and to thepreparation of dyestuffs therefor
GB656515A Improvements in and relating to cyanine and styryl dyestuffs or dye bases and to thepreparation thereof and to photographic emulsions containing the same
GB640094A Improvements in and relating to hemicyanine dyestuffs and photographic silver halideemulsions sensitised therewith
GB628837A Improvements in and relating to the preparation of dyestuff intermediates and of dyestuffs therefrom
GB624462A Improvements in photographic materials containing dyestuffs
GB625066A Improvements in and relating to a process for the manufacture of ª‡-acyl methylene derivatives of n-heterocylic bases
GB619544A Improvements in and relating to the manufacture of coloured photographic layers
GB620514A Improvements in and relating to the manufacture of coloured photographic layers
GB617223A Improvements in and relating to colour photography
GB654931A Process for the manufacture of photographic outline images and material for use therewith
GB617110A Improvements in or relating to the manufacture of silver halide emulsions
GB625907A Improvements in or relating to the preparation of symmetrical and asymmetrical meso-substituted carbocyanine dyestuffs
GB626470A Improvements in or relating to methine dyestuffs, their preparation and the sensitisation of photographic emulsions therewith