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HILTON DAVIS CHEMICAL CO

Overview
  • Total Patents
    55
About

HILTON DAVIS CHEMICAL CO has a total of 55 patent applications. Its first patent ever was published in 1979. It filed its patents most often in United States, EPO (European Patent Office) and Canada. Its main competitors in its focus markets textiles and paper, organic fine chemistry and basic materials chemistry are YAMADA CHEM CO, YAMAMOTO KAGAKU GOSEI KK and CILAG CHEMISCHES IND LAB A G.

Patent filings in countries

World map showing HILTON DAVIS CHEMICAL COs patent filings in countries
# Country Total Patents
#1 United States 37
#2 EPO (European Patent Office) 9
#3 Canada 5
#4 Japan 4

Patent filings per year

Chart showing HILTON DAVIS CHEMICAL COs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Hung William M 31
#2 Schmidt Paul J 16
#3 Crounse Nathan N 6
#4 Hung William Mo-Wei 5
#5 Jefferies Patrick J 4
#6 Uiriamu Moouei Han 4
#7 Gunn Michael B 3
#8 Cook Wayne L 3
#9 Knox Jack M 3
#10 Rebhahn Robert W J 2

Latest patents

Publication Filing date Title
US5491262A Bis{[1-(2-A-2-B)ethenyl]}[2-R2 -4-X-phenyl-or 1-(2-R2 -4-X-phenyl)ethenyl]methanes
US4736027A Indole-phthalide derivatives
US4688059A Marking systems
US4652643A 3-amido-7-disubstituted amino-10-carbonylphenothiazines
US4639750A Fluoran compounds and marking systems
US4732991A Substituted phthalides
US4697018A 9-julolidinyl derivatives and process of preparing them
US4604461A 5-substituted-9-disubstituted amino-12-substituted carbonylbenzo[a]phenoxazines
US4604458A 3-substituted carbonyloxy-7-disubstituted amino-10-substituted carbonylphenothiazines
US4604462A 4-substituted amido-8-disubstituted aminoimidazophenoxazines
US4660060A Imaging systems containing 3-(indol-3-yl)-3-(4-substituted aminophenyl)phthalides
US4595536A Triphenylmethane dyestuff
US4661605A 3-(ether and thioether)-3-(indolyl)-phthalides
EP0144958A2 Method of flushing
US4560746A Ultrafiltration process for purification of dyes useful in foodstuffs
EP0141962A1 Hydrazine derivatives of fluorans and use thereof in electrochromic recording systems
US4570171A Electrochromic marking systems
US4549192A Electrochromic marking systems
US4561001A Electrochromic marking systems
US4551740A Electrochromic and marking systems