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FOTOCHEM WERKE BERLIN VEB

Overview
  • Total Patents
    121
About

FOTOCHEM WERKE BERLIN VEB has a total of 121 patent applications. Its first patent ever was published in 1957. It filed its patents most often in German Democratic Republic, Germany and France. Its main competitors in its focus markets optics, macromolecular chemistry and polymers and basic materials chemistry are GASPAR BELA DR, JENS HERMAN CHRISTENSEN and HANS VON FRAUNHOFER.

Patent filings per year

Chart showing FOTOCHEM WERKE BERLIN VEBs patent filings per year from 1900 to 2020

Top inventors

# Name Total Patents
#1 Baumbach Wolfgang 20
#2 Welzel Helmut 12
#3 Siebert Werner 11
#4 Juergens Manfred 10
#5 Rabe Charlotte 10
#6 Wild Wolfgang 9
#7 Eichhorn Georg 8
#8 Burczyk Leonhard 8
#9 Kuschmiers Rudolf 7
#10 Barnikow Joachim 7

Latest patents

Publication Filing date Title
DD293901A5 Negative photoresist with dry development
DD293664A5 Positive resist
DD293663A5 Light-sensitive copier material
DD293662A5 Positive photocopier paint with improved application characteristics
DD293211A5 Metallians-free developers for the high-contrast development of positive photoresists on naphthochinondiazide / novolak basis
DD289349A5 Positive working photo copy lacquer
DD289265A5 Process for the selective preparation of defined with 1,2-naphthochinone-2-diazide-4-sulfonic acid and 1,2-naphthochinone-2-diazide-5-sulfonic acid mixed with stressed triydroxy-alkoxycarbonyl benzenes
DD289266A5 Method for selectively preparing high-purity 1,2-naphthochinone-2-diazide-sulfonic acid (dihydroxy-alkoxycarbonyl-phenyl) sites
DD298699A5 Method for producing substituted structures
DD301611A7 Method for producing film documentation
DD282998A5 Film document for high-sensitive black / white recording material
DD277985A1 Method for checking roentgenfilm amplifier combinations
DD277537A1 Material for the production of relief pictures
DD274818A1 Process for preparing high-purity tris-3,4,5 [5,6-naphthochinone-6-diazide- (or 3, 4 naphthochinone-3-diazid) -1 sulfonyloxy] -benzoesaeure alkyl ester
DD273701A1 Reusable, evacuatable, flexible roentgen film cassette
DD271846A1 Method for the continuous extinguishing of suspensions and solutions by ultrasound
DD286091A7 Positive photoresist with thixotropic properties
DD281733A7 Method for producing a photographic silbrbridide jodide emulsion with reduced pressure sensitivity
DD265244A1 Process for preparing a shield on film documents from cellulosetriacetate
DD264080A1 Photographic silver halogenaneous black white recording material with improved virgin sensitivity negotiating