Maschinenfabrik Andritz Actiengesellschaft

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
D21B FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT28
 
  
 
B01D SEPARATION 1133
 
  
 
B30B PRESSES IN GENERAL; PRESSES NOT OTHERWISE PROVIDED FOR 121

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE36033 Process for the comminution of materials and plants for carrying out the processJan 11, 96Jan 12, 99[D21B]
RE35091 Pressure device and seal for filter belt machinesAug 24, 93Nov 21, 95[B30B, B01D]
5314583 Process for the comminution of materials and plant for carrying out the processAug 16, 90May 24, 94[D21B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5517834 Method and device for treatment of a fibrous material-fluid mixtureExpiredJan 03, 95May 21, 96[D06B]
5292374 Process and plant for pickling stainless steel stripExpiredFeb 25, 92Mar 08, 94[C23G]
5238501 Method for treatment of a fibrous material-fluid mixtureExpiredJun 29, 90Aug 24, 93[B08B, D21C]
5217722 Apparatus for producing a conveyor beltExpiredAug 05, 92Jun 08, 93[B29C]
5203996 Apparatus for pressing, dewatering or filteringExpiredDec 03, 91Apr 20, 93[B30B]
5176189 Device for transport of material between chambers at different pressures and process for operation of this deviceExpiredJul 10, 90Jan 05, 93[B65G]
5169581 Process of producing a conveyor beltExpiredNov 06, 90Dec 08, 92[B29C]
5149515 Process for the production or recovery of acids from metalliferous solutions of such acidsExpiredNov 29, 90Sep 22, 92[C01B]
5148994 Segment for drum refiners and structure provided therewithExpiredDec 10, 90Sep 22, 92[B02C]
5127591 Apparatus for crushing or grinding of fibrous material, in particular drum refinerExpiredDec 10, 90Jul 07, 92[B02C]
5109764 Double screen belt press with a wedge compression zone for dewatering mixtures of fibrous material suspensionsExpiredSep 25, 90May 05, 92[B30B]
5100522 Process and apparatus for the manufacture of a metal foilExpiredJan 03, 91Mar 31, 92[C25D]
5085737 Apparatus for the dewatering of a web of cellulosic matter or a web of material for the pasteboard or cardboard productionExpiredJun 08, 90Feb 04, 92[D21F]
5080700 Rotatable adsorber apparatus for continuously purifying gasesExpiredSep 19, 90Jan 14, 92[B01D]
5048768 Crushing or grinding element for drum refinersExpiredMar 23, 90Sep 17, 91[B02C]
5036037 Process of making catalysts and catalysts made by the processExpiredMay 04, 90Jul 30, 91[B01J]
5032376 Method for producing aluminum titanateExpiredSep 28, 89Jul 16, 91[C04B, C01G, C01F]
5022971 Process for the electrolytic pickling of high-grade steel stripExpiredSep 13, 89Jun 11, 91[C25B]
5017198 Process for the treatment of material-gas mixturesExpiredJan 29, 90May 21, 91[B01D]
5009750 Process and apparatus for the manufacture of a metal foilExpiredNov 15, 89Apr 23, 91[C25D]

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