Deutsche Gold- und Silber-Scheideanstalt vormals Roessler

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C07D HETEROCYCLIC COMPOUNDS 3159

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE31381 Process for the preparation of propylene oxideFeb 14, 80Sep 13, 83[C07D]
RE31071 6-Aza-3H-1,4-benzodiazepinesSep 01, 81Nov 02, 82[C07D]
RE30945 Process for the preparation of propylene oxideFeb 14, 80May 25, 82[C07D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4542159 Cycloaliphatic ketoaminesExpiredMay 15, 79Sep 17, 85[A61K, C07C]
4434148 Working up of the residual gases resulting from the production of cyanuric chlorideExpiredOct 03, 79Feb 28, 84[C01B]
4408064 Bis-(silylethyl)-oligosulphides and process for their productionExpiredDec 26, 79Oct 04, 83[C07F]
4402733 Herbicidally active 1,2,4-triazin-5-one derivativesExpiredApr 20, 81Sep 06, 83[A01N, C07D]
4379871 Process for the production of carbon black containing pigment-synthetic resin concentratesExpiredDec 30, 77Apr 12, 83[C08J]
4377344 Apparatus for bringing liquids in contactExpiredNov 15, 79Mar 22, 83[B01F]
4369096 Process for the purification of epoxidesExpiredAug 18, 80Jan 18, 83[B01D]
4366138 Carbon black useful for pigment for black lacquersExpiredJun 01, 81Dec 28, 82[C01B]
4360682 Stabilizing caprolactones with dihydroxybenzenesExpiredMay 12, 80Nov 23, 82[C07D]
4353208 Exhaust gas purification apparatus for an internal combustion engine of motor vehiclesExpiredAug 19, 80Oct 12, 82[F01N]
4340490 Process for the detoxification of waste water containing phenol, phenol derivative or phenol and formaldehydeExpiredDec 20, 77Jul 20, 82[C02F]
4339616 Process for the manufacture of 1,2-diols having at least 4 carbon atomsExpiredSep 15, 80Jul 13, 82[C07C]
4332940 Process for the production of 2,3-cycloalkenopyridinesExpiredSep 06, 77Jun 01, 82[C07D]
4322250 Mastic asphalt mixtureExpiredSep 12, 79Mar 30, 82[C08L]
4318894 Apparatus for the catalytic purification of exhaust gasesExpiredDec 29, 80Mar 09, 82[F01N, B01D]
4314064 Process for the production of nicotinamideExpiredSep 29, 80Feb 02, 82[C07D]
4308673 Stiffening and likewise non-slip material for the heel region of shoes containing this material and process for stiffening the heel region of shoesExpiredJun 26, 79Jan 05, 82[A43B]
4308074 Precipitated silicic acid, method and compositions containing sameExpiredJan 23, 81Dec 29, 81[C09C]
4303621 Process for the recovery of methionine and potassium bicarbonateExpiredAug 01, 78Dec 01, 81[C01D]
4302354 Mixtures of vicinal aminoalkanols, process of preparation, and their application as corrosion inhibitorsExpiredMay 05, 76Nov 24, 81[C09K]

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