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KOPPERS CO INC

Overview
  • Total Patents
    5,946
About

KOPPERS CO INC has a total of 5,946 patent applications. Its first patent ever was published in 1914. It filed its patents most often in United States, Canada and United Kingdom. Its main competitors in its focus markets machines, basic materials chemistry and macromolecular chemistry and polymers are UNITED GAS IMPROVEMENT CO, ATOCHEM and ALLIED CHEM.

Patent filings per year

Chart showing KOPPERS CO INCs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Ackeren Joseph Van 154
#2 Joseph Becker 78
#3 D Alelio Gaetano F 63
#4 Sperr Jr Frederick W 58
#5 Greco Nicholas P 58
#6 Dressler Hans 52
#7 Gollmar Herbert A 47
#8 Carlson John D 45
#9 Leston Gerd 39
#10 Kifer Edward W 38

Latest patents

Publication Filing date Title
BR8606516A Carbon article preparation process
AU6578586A Measuring the slump of green anodes
AU6015286A Process for resotropin
FR2599029A1 Process for preparing 1,4-dihydroxy 5,8-dihydronaphtalene and related compounds.
AU5783786A Regeneration and recovery of alkali from pulp mill black liquor
US4732320A Railroad grade crossing with transverse securing splines
JPS62267362A Production of anthraquinoes
CA1257877A Process for preparing 1,4-dihydroxy, 5-8- dihydronaphthalene and related compounds
NZ215943A Wood treating composition containing didecyldimethyl ammonium chloride and 3-iodo-2-propynyl butyl carbamate
AU5641186A Wood preservative
FI861433A0 Axeltaetning foer malningsanordning.
DE3609506A1 Process for producing a composition from cellulose particles and resin for the production of fibre boards
EP0191552A2 Flexible couplings
US4705879A Long-chain alkylresorcinol phosphites
US4645780A Novel biocides employing resorcinol derivatives
US4600784A High pressure synthesis of substituted tetrathiafulvalenes
US4599464A Novel compositions
US4633022A Process for preparation of trisubstituted phenols
JPS61100586A Substituted furvalene
US4661378A Pavement dressing conditioner formed of tar, an aromatic solvent and a bituminous pavement rejuvenator