Krupp, Werner & Pfeiderer GmbH

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B29B PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS 621
 
  
 
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING 2123

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6547549 Pelletizing die for a pelletizerDec 15, 00Apr 15, 03[B29C]
6261078 PelletizerJan 28, 00Jul 17, 01[B29B]
6179460 Twin screw extruder with single-flight kneading disksDec 21, 99Jan 30, 01[B29B]
6048088 Multi-shaft screw-type extruder, in particular twin-shaft extruderApr 27, 98Apr 11, 00[B29B]
6042260 Method of carrying out continuous preparation processes on tightly meshing extruders rotating in the same senseMar 27, 98Mar 28, 00[B29C]
6024479 Screw extruder mechanism, in particular twin-screw extruder mechanism, for the processing of strongly outgassing materialsFeb 12, 98Feb 15, 00[B29B]
6015226 Screw-type extrusion machine having tie rods loaded by a pre-stressed spring systemSep 11, 98Jan 18, 00[B29B]
5593227 Twin-shaft screw-type extruding machine having mixing elements with wingsJul 25, 95Jan 14, 97[B29B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7004743 Installation for the treatment and further processing of thermoplastics and method for the operation thereofExpiredApr 11, 01Feb 28, 06[B29C]
6419864 Method of preparing filled, modified and fiber reinforced thermoplastics and twin screw extruder for putting the method into practiceExpiredOct 12, 99Jul 16, 02[B29C, B29B]
5879602 Apparatus and method for impregnating fibrous strands with plastic materialExpiredJun 24, 96Mar 09, 99[B29C]
5874682 Torque measuring device particularly for a multishaft extruderExpiredApr 25, 96Feb 23, 99[G02L]
5797677 Screw-type extruding machine having a screw element defining a groove with an expansion region at each end thereofExpiredDec 17, 96Aug 25, 98[B29B]
5679380 Underwater pelletizing die plateExpiredMar 28, 96Oct 21, 97[B29C]

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