Mannesmann DeMag AG

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C21C PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL 117

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE31566 Cooling structure for a metallurgical furnaceAug 23, 79Apr 24, 84[C21C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4967826 Process for producing metal partsExpiredOct 04, 89Nov 06, 90[B22D]
D300076 Single sheave lifting blockExpiredSep 16, 85Feb 28, 89[]
D300077 Double sheave lifting blockExpiredSep 16, 85Feb 28, 89[]
4602967 Method and apparatus for thermal longitudinal parting of rectangular metal plate bars, in particular of cut-to-length continuous-casting plate slabsExpiredJun 16, 80Jul 29, 86[B23K]
4541864 Method and apparatus for recovery and recycling of heat from hot gasesExpiredOct 31, 83Sep 17, 85[C21B]
4478393 Apparatus for thermal longitudinal parting of rectangular metal plate bars, in particular of cut-to-length continuous-casting plate slabsExpiredOct 07, 83Oct 23, 84[B23K]
4442669 Nozzle/valve device for a ducted rocket motorExpiredFeb 12, 81Apr 17, 84[F02K]
4434004 Method for recovery and recycling of heat from hot gases in metallurigical processingExpiredOct 23, 80Feb 28, 84[C21B]
4432672 Canal building apparatusExpiredNov 23, 81Feb 21, 84[E02F]
4401296 Electro-metal smelting furnace with taphole arranged at the bottomExpiredMay 22, 81Aug 30, 83[C21C]
4392434 Turbulent waterwayExpiredFeb 10, 81Jul 12, 83[A63G, B65G]
4385562 Traveling crane with top girders at the end of a bridge girderExpiredApr 01, 80May 31, 83[B66C]
4364704 Grab bucket suspended from hoisting installationExpiredNov 05, 80Dec 21, 82[B86D]
4360305 Distribution apparatus for throat closures of shaft furnaces, in particular for blast furnace closuresExpiredJul 03, 80Nov 23, 82[F27B]
4354669 Apparatus for regulating the quantities and percentages of the gaseous constituents of oxygen, nitrogen, carbon dioxide and water in reaction processes in metallurgical applicationsExpiredFeb 20, 81Oct 19, 82[C21B]
4354670 Lining apparatus for metallurgical vessels, particularly for steel mill converters and/or blast furnacesExpiredMay 28, 80Oct 19, 82[C21B]
4353606 Mounting for a driven wheelExpiredMay 30, 80Oct 12, 82[F16C]
4345939 Method for providing oxygen enhanced air for use in metallurgical processesExpiredOct 31, 79Aug 24, 82[C21B]
4344515 Claw clutchExpiredApr 02, 80Aug 17, 82[F16D]
4345332 Cover for vessel for a metal melting furnace, in particular an electric arc furnaceExpiredOct 21, 80Aug 17, 82[F27D]

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