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HOECHST CO AMERICAN

Overview
  • Total Patents
    840
About

HOECHST CO AMERICAN has a total of 840 patent applications. Its first patent ever was published in 1963. It filed its patents most often in United States, Japan and EPO (European Patent Office). Its main competitors in its focus markets optics, machines and organic fine chemistry are SPECTRA GROUP LTD INC, CYCOLOR INC and HONNY CHEMICAL IND.

Patent filings per year

Chart showing HOECHST CO AMERICANs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Walls John E 83
#2 Corso Anthony J 31
#3 Gillich Thomas N 22
#4 Norton Lyle K 20
#5 Culbertson Edwin C 19
#6 Liu Shuchen 17
#7 Dhillon Major S 16
#8 Horner Ellwood J 16
#9 Phillips Thomas S 16
#10 Kelly Michael G 16

Latest patents

Publication Filing date Title
US4772533A Positive working naphthoquinone diazide color proofing element with polyvinyl acetate adhesive layer
EP0221428A2 Liquid for the treatment of a photoresist composition, and process therefor
US4863827A Postive working multi-level photoresist
EP0220645A2 Photosensitive positive composition and photoresist material prepared therewith
US4810434A Process for manufacture of surface-modified oriented polymeric film
EP0226741A2 Process for producing a positive photoresist
US4665124A Resin
EP0212482A2 Process for obtaining negative images from positive photoresists
EP0211406A2 Photopolymerizable composition with polyvinyl acetal as a binder, and registration material prepared thereof
EP0216083A1 Polyvinyl acetal and photosensitive composition containing it
EP0210492A1 Water-soluble monoazo compounds, process for their preparation and their use as dyestuffs
US4726928A Radiation-resistant vinyl halide resin compositions and a process for their production
US4661056A Turbulent incineration of combustible materials supplied in low pressure laminar flow
EP0195315A2 Process for the production of photoresist patterns
DE3605717A1 POLYMERIZABLE MIXTURE BY RADIATION
US4745019A Graphic film having a copolyester primed polyester film as its substrate
EP0188228A2 Colour-proof foil for the overlay process
US4630492A Automatic staple fiber sampler
EP0184725A2 Light-sensitive composition
US4692397A Process for developing an aqueous alkaline development diazo photographic element