Learn more

ZAHN & CO G M B H

Overview
  • Total Patents
    44
About

ZAHN & CO G M B H has a total of 44 patent applications. Its first patent ever was published in 1927. It filed its patents most often in Germany, France and United Kingdom. Its main competitors in its focus markets materials and metallurgy, chemical engineering and surface technology and coating are URTEK LLC, GUARESCHI PIETRO and SCHWEIZERHALL SAEUREFAB.

Patent filings in countries

World map showing ZAHN & CO G M B Hs patent filings in countries
# Country Total Patents
#1 Germany 20
#2 France 14
#3 United Kingdom 6
#4 United States 3
#5 Austria 1

Patent filings per year

Chart showing ZAHN & CO G M B Hs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Schaetzler Friedrich 2
#2 Hans Barkholt 2
#3 Knauer Dr Helmut 1
#4 Wolters Hermann 1
#5 Schaedel Dipl-Ing Heinz 1
#6 Mueller Johann 1
#7 Spitzner Herbert Dipl-Ing 1
#8 Helms Dr Gerd 1
#9 Jungmann Guenther 1
#10 Doell Dr Richard 1

Latest patents

Publication Filing date Title
GB1057784A Process for preparing alkali metal chromate solutions
GB1057678A Process for preparing alkali metal chromate solutions
GB1060003A Process and apparatus for the alkaline roasting of materials containing chromium oxide
GB473248A An improved process for obtaining sulphur from gases containing hydrogen sulphide
US2118802A Method of conserving pickling liquor
US2169379A Elemental sulphur from hydrocarbon gases containing hydrogen sulphide
GB447003A Improvements in or relating to the production of zinc white
GB406919A Improvements in and relating to a process for carrying out highly exothermic oxidation processes