Brennstoffinstitut Freiberg

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4971550 Burner with electric igniter for gaseous fuels and oxygenExpiredSep 29, 89Nov 20, 90[F23Q]
4710202 Apparatus for gasifying pulverized coalExpiredNov 07, 86Dec 01, 87[C10J]
4707163 Gasification of coal dustExpiredOct 29, 85Nov 17, 87[C10J]
4704971 Pulverized-coal burnerExpiredDec 05, 86Nov 10, 87[F23D]
4521139 Method of regulating mass streamsExpiredJul 19, 82Jun 04, 85[B65G]
4501156 Method of and device for measuring a mass stream of finely divided fine-grained solid fuelsExpiredJul 19, 82Feb 26, 85[G01F]
4483199 Method of measuring solid matter mass flowExpiredSep 20, 82Nov 20, 84[G01F]
4475735 System for sealing shafts against solid containing gaseous mediaExpiredJan 25, 83Oct 09, 84[F16J]
4455949 Burner for gasification of powdery fuelsExpiredFeb 13, 80Jun 26, 84[F23D]
4369163 Thermal shielding for bottoms and covers of reaction vesselsExpiredNov 03, 81Jan 18, 83[F28D]
4367076 Method and apparatus for processing of dust-contaminated hot product gasExpiredMar 26, 81Jan 04, 83[C10J]
4343626 Reactor for producing a carbon monoxide and hydrogen containing gasExpiredFeb 19, 80Aug 10, 82[C10J]
4325709 Method for the operation of gasification plants for pulverized fuelsExpiredMay 17, 79Apr 20, 82[C10J]
4305732 Gasification apparatus with pressure relieving meansExpiredFeb 19, 80Dec 15, 81[C10J]
4300913 Apparatus and method for the manufacture of product gasExpiredDec 18, 79Nov 17, 81[C10J]
4247227 Apparatus for the conveyance of dust-like or dust containing solids into a pressurized system by means of a pressurized lock chamberExpiredDec 19, 78Jan 27, 81[B65G]

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