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CHEMISCHE WERKE WITTEN GMBH

Overview
  • Total Patents
    697
About

CHEMISCHE WERKE WITTEN GMBH has a total of 697 patent applications. Its first patent ever was published in 1948. It filed its patents most often in Germany, France and United Kingdom. Its main competitors in its focus markets organic fine chemistry, macromolecular chemistry and polymers and machines are SANKYO ORGANIC CHEM CO LTD, IT RESINE SOC and WINGO TECH CO LTD.

Patent filings in countries

World map showing CHEMISCHE WERKE WITTEN GMBHs patent filings in countries

Patent filings per year

Chart showing CHEMISCHE WERKE WITTEN GMBHs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Renckhoff Gustav 63
#2 Renckhoff Dr Rer Nat Gustav 34
#3 Wolfes Wolfgang 31
#4 Katzschmann Ewald 29
#5 Renckhoff Gustav Dr Rer Nat 27
#6 Rer Nat Renckhoff Gustav Dr 21
#7 Katzschmann Dipl-Chem Ewald 20
#8 Gustav Renckhoff 19
#9 Katzschmann Ewald Dipl Chem 18
#10 Hulsmann Hans-Leo 17

Latest patents

Publication Filing date Title
US3944602A Process for the preparation of terephthalic acid
US3705186A Process for the preparation of diphenyl terephthalate
CH498081A Preparing pure colourless diphenyl terephthalate from
DE1668884A1 Process for the production of pure, colorless diphenyl terephthalate
US3513193A Process for the preparation of terephthalic acid
DE1595495A1 Process for the production of mixed polyamides of tere- and isophthalic acid with aliphatic dicarboxylic acids in fine-grained form
DE1570409A1 Process for the production of water-soluble lacquer binders
DE1467519A1 Process for the production of color-stable first-run fatty acids
ES317274A1 A procedure for the preparation of copolyamides of oxalic acid. (Machine-translation by Google Translate, not legally binding)
DE1259326B Process for obtaining pure terephthalic acid
DE1570369A1 Process for the production of polyamides modified with finely divided fillers in powder form
DE1570357A1 Process for the production of polyamides reinforced with inorganic fibers
ES313746A1 Procedure for the purification of an acid for oximetilbenzoico. (Machine-translation by Google Translate, not legally binding)
DE1546868A1 Process for hot-melt coating of metals with polyamides in powder form
DE1228242B Stabilization of molten dimethyl terephthalate
DE1570343A1 Process for the production of linear, thermoplastic polyesters
DE1570341A1 Process for the production of polyethylene terephthalate
DE1570340A1 Process for the production of polyethylene terephthalate
DE1570330A1 Process for the preparation of mixed polyamides of oxalic acid with isophthalic acid and terephthalic acid in fine-grained form
GB1078812A Improvements in or relating to the preparation of copolyesters