Lumalampan Aktiebolag

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4952187 Method for the manufacture of compact low-pressure mercury discharged lampExpiredAug 07, 89Aug 28, 90[H01J]
4916359 Gas discharge lamp envelope comprising a barium sulphate protective layer disposed on its inner surfaceExpiredApr 13, 88Apr 10, 90[H01J]
4881007 Compact gas discharge tube and a method for its manufactureExpiredMar 08, 88Nov 14, 89[H01J]
4761585 Fitting for compact electric discharge lampsExpiredOct 10, 86Aug 02, 88[H05B]
4688874 Arrangement in electric discharge lampsExpiredFeb 07, 86Aug 25, 87[H05K]
4689521 Compact low pressure mercury vapor discharge lampExpiredMay 19, 86Aug 25, 87[H01J]
4646660 Arrangement in apparatus for the combustion of waste gasesExpiredDec 10, 85Mar 03, 87[F23G]
4606762 Process for the recovery of mercuryExpiredMar 25, 85Aug 19, 86[C22B]
4564174 Device for the recovery of mercuryExpiredJun 11, 84Jan 14, 86[C22B]
4481889 Method and apparatus for afterburning flue gasesExpiredMay 25, 83Nov 13, 84[F23G, F22B, F23C]
4468011 Device for the recovery of mercuryExpiredNov 18, 82Aug 28, 84[C22B]
4440729 Procedure for chemical, automatic dissolution of molybdenum core wire in tungsten filament coil and a device for implementing the procedureExpiredApr 14, 81Apr 03, 84[C01G]
4268306 Process for removing mercury from solid waste materialExpiredFeb 25, 80May 19, 81[C22B]
4254943 Apparatus for removing mercury from solid waste materialExpiredJul 17, 79Mar 10, 81[C22B]
4216406 Electric lamp wherein the terminal socket cap contains a foamed cap cement which functions to prevent explosions and/or burning a hole through the capExpiredSep 08, 78Aug 05, 80[H01K]

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