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SULPHITE PRODUCTS CORP

Overview
  • Total Patents
    51
About

SULPHITE PRODUCTS CORP has a total of 51 patent applications. Its first patent ever was published in 1943. It filed its patents most often in United States, Canada and Austria. Its main competitors in its focus markets organic fine chemistry, textiles and paper and macromolecular chemistry and polymers are ONTARIO PAPER CO LTD, VITAWORKS IP LLC and G K ANALYTICAL SCIENCES LIMITE.

Patent filings in countries

World map showing SULPHITE PRODUCTS CORPs patent filings in countries
# Country Total Patents
#1 United States 25
#2 Canada 23
#3 Austria 1
#4 Switzerland 1
#5 Finland 1

Patent filings per year

Chart showing SULPHITE PRODUCTS CORPs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Pearl Irwin A 37
#2 Wiley Averill J 6
#3 Lewis Harry F 5
#4 Dubey George A 4
#5 Lueck Bernard F 2
#6 Mcelhinney Thomas R 2
#7 Grangaard Donald H 2
#8 Julius Benko 1
#9 Benko Julius 1
#10 Emil Brauns Friedrich 1

Latest patents

Publication Filing date Title
US3395087A Electrodialysis cell
US3148177A Treatment of spent sulfite liquor
US3136710A Electrodialysis
US3017951A Transfer of gases into and from liquid media
US2996540A Preparation of para-hydroxybenzoic acid
US2944922A Treatment of spent sulphite liquor
US2724727A Bivanillyl and method of making same
US2644830A Vanillimino ethyl ether and its salts of anhydrous acids
US2602089A Process of preparing guaiacyl compounds from lignin
US2644822A 2, 3-bis-(oxybenzyl)-butane derivatives
US2609323A Alkyl vanillate ointment
US2568760A Filter for ultraviolet radiations
US2580461A Ultraviolet-radiation impervious wrapping material
US2488186A Process for preparing phenolic material from a lignin substance
US2483559A Process of preparing vanillic acid
US2553146A Production of vanillic acid
US2516412A Method of synthesizing syringaldehyde
US2438789A Production of organic acids
US2446606A Production of vanillic acid
US2431419A Recovery of vanillic acid