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LYMAN CHALKLEY

Overview
  • Total Patents
    34
About

LYMAN CHALKLEY has a total of 34 patent applications. Its first patent ever was published in 1939. It filed its patents most often in United States and Germany. Its main competitors in its focus markets optics, basic materials chemistry and machines are MARIO MICHELS, ILFORD LTD and GEVAERT PHOTO PRODUCTEN NAAMLO.

Patent filings in countries

World map showing LYMAN CHALKLEYs patent filings in countries
# Country Total Patents
#1 United States 33
#2 Germany 1

Patent filings per year

Chart showing LYMAN CHALKLEYs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Lyman Chalkley 32
#2 Chalkley Lyman 2

Latest patents

Publication Filing date Title
US3615563A Dye cyanides photoactivated by inorganic salts
US3306748A Photosensitive system based on hydrophobic dye cyanides and polyvinylpyrrolidone
US3122438A Photosensitive combination of cellulose with a hydrophobic dye cyanide and process for making it
US2981622A Photographic process
US2951855A Dye cyanides
US3071464A Photographic process
US2877169A Hydrophilic dye cyanides-hydroxyalkyl compounds
US2877168A Cyanide of acid fuchsine, method of preparing the same, and photochemical process
US2864753A Cyanide of soluble blue and method of using same
US2936276A Photochemical compositions and processes utilizing salts of para-amino triphenylacetonitriles
US2877167A Hydrophilic cyanide of para-amino triphenylmethane dyes
US2864752A Photosensitive compounds
US2864751A Photosensitive compounds and process of using same
US2855304A Aqueous aurin cyanide solutions and sensitizing process
US2877166A Dye cyanides and photosensitive compositions containing same
US2936235A Photoactivation of aminotriarylmethane dye cyanides
US2855300A Process for fixing images on dye cyanide photosensitized materials
US2829149A New fuchsine cyanide
US2829148A Purification of cyanides of triarylmethane dyes
US2839543A Process for preparing cyanides of triarylmethane dyes