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J W CHAFER LTD

Overview
  • Total Patents
    12
About

J W CHAFER LTD has a total of 12 patent applications. Its first patent ever was published in 1952. It filed its patents most often in United Kingdom, France and Canada. Its main competitors in its focus markets agriculture, basic materials chemistry and mechanical elements are THORNE BARBARA L, HUALI FAMILY PRODUCTS CO LTD and DOMOBIOS.

Patent filings in countries

World map showing J W CHAFER LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 7
#2 France 2
#3 Canada 1
#4 Germany 1
#5 United States 1

Patent filings per year

Chart showing J W CHAFER LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Chafer Charles Littlewood 4
#2 Palgrave Derek Aubrey 2
#3 Smith Geoffrey David 1
#4 Littlewood Chafer Charles 1
#5 Chafer Charles L 1
#6 Clark Robert 1

Latest patents

Publication Filing date Title
GB1192130A Process for the Neutralisation of Phosphoric Acid and the Productin of Phosphatic Compositions thereby
GB1165257A Fertilisers
GB1041557A Improvements in and relating to powdered pesticides
GB917386A Improvements in or relating to tractor mounted agricultural implements
US2976643A Machine for spraying powdered materials
GB914728A Apparatus for spraying powdered materials
GB734361A Improvements in and relating to agricultural spraying machines
GB735069A Pipe connection
CA641904A Apparatus for spraying powdered materials