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WHIFFEN & SONS LTD

Overview
  • Total Patents
    88
About

WHIFFEN & SONS LTD has a total of 88 patent applications. Its first patent ever was published in 1951. It filed its patents most often in United Kingdom, France and United States. Its main competitors in its focus markets organic fine chemistry, machines and materials and metallurgy are TRINAPCO INC, GEORG SCHROETER DR and GEORGE A BREON AND COMPANY.

Patent filings in countries

World map showing WHIFFEN & SONS LTDs patent filings in countries
# Country Total Patents
#1 United Kingdom 41
#2 France 13
#3 United States 11
#4 Germany 10
#5 Spain 7
#6 Austria 2
#7 Sweden 2
#8 Switzerland 1
#9 Israel 1

Patent filings per year

Chart showing WHIFFEN & SONS LTDs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Smith Michael Arthur 10
#2 Argyle Christopher Stanley 10
#3 Reed Ronald Arthur 8
#4 John Needham Brian 8
#5 Arthur Smith Michael 8
#6 Vero Eric 6
#7 Needham Brian John 5
#8 Mason Kenneth George 5
#9 Miller John 4
#10 Arthur Reed Ronald 4

Latest patents

Publication Filing date Title
ES325673A1 A procedure for the preparation of azines and-or isohydrazones. (Machine-translation by Google Translate, not legally binding)
US3332739A Process for preparing hydrazine and substituted hydrazine from their carbonyl derivatives using cation exchange resins
GB1022733A Triaminobenzene
GB1072675A Detergent compositions
GB1093611A A composition and process for the production of expandible resins
GB1081292A Isohydrazone derivatives
GB1085794A Isohydrazone derivatives and the preparation of hydrazines therefrom
GB1060065A Improvements in or relating to hydrazine hydrate
GB1071877A Preparation of hydrazine and substituted hydrazines
GB1070781A Detergent compositions
GB1066055A Preparation of organic derivatives of hydrazine
GB1066054A Preparation of hydrazine derivatives
GB1073292A Recovery of hydrazine
GB1055879A Preparation of carbohydrazide
ES283385A1 A procedure for the oxidation of hydrazoamides (Machine-translation by Google Translate, not legally binding)
GB1037011A Novel sulpholane oximes
GB955451A Improvements in or relating to sulpholane
GB1047525A Sulpholanyl phenylhydrazines
US3196163A Hydrazosulpholanes and their preparation
GB1034481A Substituted phenyl hydrazines and compositions containing them